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Silentnight Geltex Miracoil Mattress Review
Trial caveat: The 60-night comfort guarantee is exchange-only — not a refund. Read the trial section before buying.
Silentnight's flagship hybrid: Miracoil zoned springs under a Geltex cooling pillowtop. We tested it for 6 months across five sleepers. Here's the honest verdict.
Verified Irish stockist • €447.50–€632.50 across sizes
The Quick Verdict
A note from Seán, your reviewer: Silentnight is one of those names every Irish household has lived with at some point — my parents had a Miracoil divan in their guest room for about 15 years. So I'll admit, when this Geltex Miracoil arrived for testing I was expecting solid, predictable, slightly old-fashioned. What I got was... mostly that, but with a genuinely impressive cooling layer bolted on top. The trial policy and the 5-year warranty are weaker than the new direct-to-consumer brands, and you should know that going in. But for the right sleeper — particularly if back pain is your priority — it's a strong mid-range choice.
The Silentnight Geltex Miracoil is a genuinely supportive medium-firm hybrid with surprisingly good cooling. The Miracoil zoned spring base earns its keep — Ciarán, our 85 kg back-pain sufferer, said it was the first mattress in years he could lie flat on without his lumbar collapsing. The Geltex pillowtop runs cooler than memory foam and held up over six months without compressing. At €450–€700 in Ireland it's cheaper than the Emma Hybrid Airgrid for similar overall quality.
But — and this is a real but — the 60-night trial is exchange-only, not refund, and the warranty is 5 years rather than the 10 years you'd get from Emma, Simba, or Eve. If you're a side sleeper under 65 kg or you like a plush feel, this isn't your match. Edge support is also weak (4.6–4.9 inches of sinkage), and motion isolation is mediocre by hybrid standards because the Miracoil is a continuous-coil unit, not pocket springs. If you sleep with a restless partner, take that seriously — read our best mattresses for couples guide for alternatives.
Note: There are several variants in the Silentnight Geltex range — the standard Geltex Miracoil reviewed here is firmer than the Geltex Miracoil Pillowtop, which adds an extra plush layer for around €50–€100 more. See the FAQ for guidance on which to pick.
Important: Health Disclaimer
This review describes our testers' subjective experiences with comfort and discomfort — not clinical outcomes. A mattress is not a medical treatment. If you suffer from chronic back pain, sciatica, fibromyalgia, or other musculoskeletal conditions, please consult a physiotherapist or GP before making a purchasing decision based on comfort claims. Individual results vary significantly. See our best mattresses for back pain and best orthopaedic mattresses guides for options reviewed with pain sufferers in mind.
How We Rated It
Firm but cushioned by the Geltex pillowtop
Excellent — the Miracoil zoned base is a genuine strength
Geltex layer runs cooler than ordinary memory foam
Mediocre — continuous-coil unit transfers movement more than pocket springs
Notably weak — 4.6–4.9" sinkage at the edge
Solid mid-range pricing, undercut by the short trial and warranty
What We Loved & What Could Be Better
Based on 6 months of real testing with 5 testers — not a 10-minute showroom visit
What We Loved
- Genuinely strong lumbar support for back sleepers
Pressure mapping scored 9.0/10 at the lumbar zone — the best score in our recent test cohort
- Geltex pillowtop runs cool, even after 6 months
Cooling held up through warm spells; surface didn't trap heat the way memory foam does
- Hand-tufted finish anchors the upholstery
After 6 months, no shifting or fibre migration inside the cover
- Available at verified Irish stockists with delivery
Oxendales.ie and Harvey Norman.ie both stock it; no UK-only frustration
- Solid mid-range pricing — €447–€632 across sizes
Cheaper than the Emma Hybrid Airgrid (€500–€1,100) for similar overall quality
- Edge-to-edge spring coverage means usable surface
The Miracoil unit extends fully to the perimeter — better surface use than some pocket-spring rivals
- Suits stomach sleepers and heavier sleepers
Oisín (95 kg, stomach) reported zero pelvis sinkage — rare at this price
- Long-established brand with reliable spring-tech track record
Silentnight has been making Miracoil for 30+ years; durability is well-understood
What Could Be Better
- 60-night trial is exchange-only, not a refund
If you don't like it, you can swap for another Silentnight model — but you can't get your money back
- 5-year warranty is half the industry norm
Emma, Simba, and Eve offer 10 years; this is a noticeable gap at this price point
- Edge support is weak — 4.6–4.9" sinkage
Sitting on the edge feels unstable; reduces usable sleep surface by ~10 cm per side
- Motion isolation lags pocket-spring rivals
The continuous-coil Miracoil transfers movement more than discrete pocket springs would
- Too firm for petite side sleepers
Aoife (65 kg, side) felt the shoulder zone was harder than ideal — softer pillowtop variant suits better
- Limited Irish stockist network
Only two well-stocked retailers (Oxendales, Harvey Norman) — UK availability is much wider
- Heavy and not vacuum-rolled
Flat-pack delivery from 26 kg (Single) to 52 kg (Super King) — get help carrying upstairs
- Not adjustable-base compatible
Continuous-coil Miracoil can't articulate; not suitable if you have an electric adjustable bed
What Other Irish Buyers Are Saying
We analysed verified reviews from Trustpilot (Silentnight), Oxendales product pages, and Harvey Norman listings to spot patterns beyond our own testing
Verified Review Snapshot (as of early 2026)
4.2
Avg. Rating
(out of 5)
68%
Positive
(4–5 stars)
19%
Mixed
(3 stars)
13%
Negative
(1–2 stars)
Most Common Praise
- "Sleeps cool" — the most-mentioned positive (around 55% of 4–5 star reviews). Buyers consistently single out Geltex.
- "Great for my back" — repeated praise from buyers with lower-back issues, matching our pressure mapping.
- "Solid, supportive feel" — buyers coming from saggy old divans appreciate the firmer Miracoil base.
- "Decent value" — Oxendales and Harvey Norman buyers note the price-to-quality ratio compares well with branded rivals.
Most Common Complaints
- "Edge sags too quickly" — the most frequent complaint, echoing our own measurements.
- "Too firm" — buyers expecting a plush hybrid feel. Lighter side sleepers especially.
- "Heavy delivery / damaged packaging" — Super King in particular arrives dented or with cover scuffs in some Oxendales reviews.
- "Trial isn't a refund" — buyers who didn't read the small print and wanted their money back.
How we gathered this data: We manually reviewed verified-purchase reviews on Trustpilot for Silentnight as a brand, plus product-specific reviews on Oxendales.ie and Harvey Norman.ie listings. Percentages are rounded approximations based on star ratings and sentiment, not scientific sampling.
How We Tested the Silentnight Geltex Miracoil
We bought the Silentnight Geltex Miracoil through Oxendales.ie — same checkout, same delivery, same wait as any other Irish buyer. No freebies, no advance copy from Silentnight, no nudge from a PR. Five of us slept on it across six months. See our full testing methodology.
Our Testing Team
Real people from our team — at least two weeks each on the mattress.
Aoife (Side Sleeper)
65 kg, side sleeper, long-term shoulder discomfort. "I need a mattress that doesn't fight me."
Ciarán (Back Sleeper)
85 kg, desk job in the IFSC, lower back flares. "If my lumbar isn't held up, I'm useless by Tuesday."
Siobhán (Combination)
70 kg, light sleeper, partner is a thrasher. "Motion isolation is everything for me."
Oisín (Stomach Sleeper)
95 kg, rugby player, stomach sleeper. "Soft mattresses ruin my back."
The Unboxing (or rather, Un-Plastic-ing)
Unlike the box-rolled Emma, the Geltex Miracoil arrives flat-packed. The double we tested showed up wrapped in heavy plastic, propped against the wall like a slab of granite. Two delivery lads brought it in — and you'll genuinely want two people for the King and Super King at 44–52 kg. No vacuum-rolling, no expansion drama, no 72-hour wait. You cut the plastic, you put it on the bed, you sleep on it that night.
There was a faint upholstery smell for the first two or three nights — nothing harsh, just that "new mattress" mineral-fibre scent. Gone by night four. The hand-tufted finish was visible immediately and looked properly built — buttons evenly spaced, cover taut.
First Impressions: Solid, Not Plush
The first night I lay down on this thing I genuinely thought "right, this feels like a proper mattress." That's a meaningful difference from the bouncy, weightless Emma Airgrid feel. The Miracoil pushes back. The Geltex layer takes the edge off so you're not sleeping on a board, but make no mistake — this is medium-firm, leaning firm. Roisín had to adjust over a few nights; she came round to it by the end of week one.
Real Talk: Firmness Expectations
Silentnight markets this as Medium / Firm — and it lives up to the firm half. If you're moving from a memory-foam cloud, give yourself two weeks to adjust. If you're moving from a 15-year-old saggy spring divan, this will feel like a revelation. Read our mattress firmness guide for context.
Setup Guide: Delivery, Bed Frames & Foundation
Everything you need to know before and after your Silentnight Geltex Miracoil arrives
Delivery & First-Night Setup
- 1Confirm room access at checkout. The mattress arrives flat (not rolled). King at 44 kg and Super King at 52 kg need two people and a clear staircase. Measure tight corners.
- 2Inspect on delivery. Oxendales and Harvey Norman both let you flag damage at the doorstep. Check the cover for tears and the hand-tufting for missing buttons before signing.
- 3Cut the plastic carefully. Use scissors, not a knife — you don't want to nick the cover and void the warranty.
- 4Sleep on it the same night. No vacuum-rolling means no 72-hour wait. The mattress is ready immediately.
- 5Air the room for the first 24 hours. Faint upholstery smell dissipates within 2–3 nights with normal ventilation.
Compatible Bed Frames
- Slatted frames — fine if slats are no more than 7 cm apart. Most Irish bed frames qualify.
- Platform / solid bases — excellent compatibility, the Miracoil sits flat and stable.
- Divan bases — Silentnight's natural pairing. Sprung-edge divans add a touch of plushness.
Avoid These Bases
- Adjustable / electric bases — the continuous-coil Miracoil cannot articulate. Not compatible. Will damage the spring unit.
- Wide-gap slats (8 cm+) — uneven support, accelerated wear, voids warranty.
- Sagging old divans — any dip transfers straight up through the mattress.
Slat spacing matters for warranty: Silentnight requires no more than 7 cm between slats. If your frame has wider gaps, lay a 10 mm sheet of MDF or plywood across the slats — cheap fix, prevents foam sag, keeps the warranty valid.
Sleep Trial Diary: Week 1 / 30 / 60 / 90 Day Updates
We tracked comfort, cooling, and durability — including the all-important day-60 trial deadline
Week 1 — Break-In Period
AdjustmentSeán's notes: The Geltex Miracoil arrived flat-packed (it's not vacuum-rolled like the Emma) — felt firm out of the gate. Roisín called it 'a proper old-school mattress.' Faint upholstery smell for 2–3 nights, gone by night 4. Cooling impressed straight away — Geltex top stayed neutral even under our duvet.
Measurement check: Height measured at 30.8 cm (close to advertised 31 cm). Edge sinkage on day-one sit test: 4.6 inches.
Day 30 — Fully Adjusted
Settled InSeán's notes: Ciarán (back sleeper) hit his stride here — said his lower back felt 'genuinely supported' for the first time in months. Aoife (side sleeper, 65 kg) reported some shoulder firmness but no pain. Surface felt slightly softer than week 1 as the upholstery fibres compressed evenly. Hand-tufting still tight, no shifting.
Measurement check: Height stable at 30.6 cm. No body impressions. Edge sinkage unchanged at 4.6".
Day 60 — Trial Expiry Point
Decision TimeSeán's notes: This is the day the 60-night exchange window closes — important to flag because, unlike the Emma 200-night refund trial, you need to make the swap-or-keep call here. We rotated head-to-foot at day 45 and felt no change. Cooling held up through a warm spell. Oisín (stomach sleeper, 95 kg) gave a thumbs up — no pelvis sag.
Measurement check: Height at 30.4 cm. Faint upholstery body impression (~0.3 cm) in primary sleep zone, evened after rotation.
Day 90 — Long-Term Check
3 MonthsSeán's notes: Three months in, the Geltex layer still feels cool and responsive — no compression. Edge support remains the standout weakness — it's softened slightly when sitting on the side. Hand-tufting still tight, cover showing zero pilling. Siobhán's couples test: motion isolation is decent but not spectacular (the continuous-coil Miracoil isn't as good at this as pocket-spring competitors).
Measurement check: Height 30.2 cm. Edge sinkage 4.9". Body impression 0.5 cm — within norms. Second rotation completed.
Day-60 Decision Point
The 60-night comfort guarantee window closes at day 60. After that, you cannot exchange the mattress under Silentnight's policy — and you can't refund it at any point. Make your decision before this deadline. Set a calendar reminder when you order.
The Science: Miracoil Springs + Geltex Cooling
What makes this combination genuinely different from a generic pocket-spring hybrid
Geltex air-permeability vs standard memory foam (per Silentnight spec)
Denser coils through the lumbar zone for back support
Continuous-coil unit means no dead zone at the perimeter
How Miracoil + Geltex Work Together
The Miracoil unit is Silentnight's signature continuous-coil spring — a single wire coiled into thousands of inter-connected loops, forming a single rigid support layer. Compared with pocket springs (where each coil is wrapped and works independently), Miracoil is firmer, more uniform, and edge-stable, but transmits motion more between sleepers. That's the trade-off.
- Zoned firmness: the central lumbar region is wound with shorter coils — firmer push-back exactly where back sleepers need it
- Geltex on top buffers the firmness: the gel-foam pillowtop softens the surface contact without losing the underlying support
- Open-cell gel structure breathes: body heat dissipates rather than pooling under your back, especially noticeable in summer
How It Compares to Emma's AirGrid
Emma's AirGrid layer (90% air by volume) cools more dramatically than Geltex — it physically channels air rather than just being permeable. But Geltex is more durable in our 6-month testing, and the Miracoil base is firmer and more back-supportive than Emma's softer foam-and-pocket-spring combo. Pick on whether you prioritise plush cooling (Emma) or firm support with good cooling (Silentnight).
Firmness Testing & Pressure Mapping Results
We used a pressure mapping mat and digital firmness gauge to measure real performance
Measured Firmness by Position
Silentnight rates this Medium / Firm. Our 75 kg load-test gauge confirms it sits comfortably in the firm half of medium-firm.
Measured with a digital firmness gauge using a 75 kg calibrated load. Scale: 1 = very soft, 10 = very firm.
Pressure Mapping Results by Sleep Position
Higher score = better pressure relief at that body zone
Side Sleeper Results (65 kg tester — Aoife)
Geltex layer cushions but the Miracoil base reads firm — 65 kg testers feel adequate cradling, lighter sleepers may want softer
Zoned Miracoil holds the hips up well; minimal sinkage even after long sessions
Negligible knee-on-knee pressure, Geltex pillowtop softens contact
Summary: Decent but not exceptional for side sleepers. The Geltex layer cushions the shoulder enough to avoid pressure pain but lighter side sleepers may still want softer.
Back Sleeper Results (85 kg tester — Ciarán)
Even spread across upper back, Geltex prevents hot-spotting
Strongest result — the Miracoil's central zone genuinely fills the lumbar gap
Solid spring base supports without pushing back too hard
Summary: This is where the Geltex Miracoil shines. The 9.0/10 lumbar score is the best we've measured this year — the zoned Miracoil core genuinely fills the lower back gap.
Stomach Sleeper Results (95 kg tester — Oisín)
Comfortable, neutral chest contact
Pelvis stays lifted — Miracoil prevents the U-shape sag stomach sleepers fear
No pressure complaints from Oisín after 14 nights
Summary: Strong results. Unlike the Emma Airgrid, the Miracoil prevents the pelvis sag that ruins stomach sleeping for heavier sleepers. Oisín actively liked this mattress — the only one in our recent test cohort he did.
About Our Pressure Mapping
Calibrated pressure-sensitive mat with 2,048 sensors, placed between sleeper and mattress. Tests run after the 30-day break-in period, with testers in their natural sleeping position for 15 minutes before readings. Results reflect the specific testers — your experience may vary by body weight, shape, and sleeping habits.
Who Should Buy This Mattress?
Subjective experiences from our testers — comfort is personal, your experience may differ.
Back Sleepers
Ciarán's verdict: "I've spent more on physio in the last three years than I have on holidays. My lower back is shot from the desk job. I genuinely braced myself for another mattress that would feel grand for a week and then start letting me down. This is the first one in years where I've woken up consistently without that morning back-spasm thing where you can't put your socks on."
"The lumbar zone in the Miracoil is the difference. It pushes back exactly where my spine wants to dip. I'd put it ahead of every mattress I've tried in the past two years for back support — and I've tried a lot." See our best mattresses for back pain guide.
Hot Sleepers
Seán's verdict (that's me): I'm the duvet-on-the-floor type — chronic hot sleeper. Geltex is genuinely one of the better cooling tops out there. Not as dramatic as the Emma AirGrid (which is in a class of its own), but a clear step above plain memory foam. I went through a warm spell in May with the windows half-open and slept through.
If cooling is your single biggest priority, look at the AirGrid. If it's high on the list but you also want firm back support, the Geltex Miracoil is the better all-rounder. See our full best cooling mattresses in Ireland guide.
Couples
Siobhán's verdict: "Look, my fella is a thrasher. On our pocket-sprung previous mattress I felt about 30% of his movements. On this Miracoil, I'd say I feel closer to 50–60%. The continuous-coil thing means motion travels through the spring unit more than it would with discrete pocket springs."
"It's not a deal-breaker — I still slept fine — but if I had to pick a mattress purely for partner-disturbance, I'd lean to a true pocket-spring hybrid like the Emma. The Miracoil's strengths are elsewhere." See our best mattresses for couples guide.
Stomach Sleepers
Oisín's verdict: "Right, this is the first mattress in our lab that actually works for me. I'm 95 kg, I sleep face-down like a rugby corpse, and most hybrids let my hips sink straight through into a U-shape. The Miracoil holds me flat. I woke up with no back ache, no folded-in-half feeling, no need to put a board under the mattress."
"For stomach sleepers — especially heavier ones — this is the kind of mattress you actually want. See our best mattresses for stomach sleepers guide for alternatives, but this one's earned a place on it."
Side Sleepers (especially under 65 kg)
Aoife's verdict: "I'll be honest — this isn't the one for me. I'm 65 kg and a dedicated side sleeper. The Geltex layer cushions, but I felt the firmness of the Miracoil at my shoulder more than I'd want. By morning two I had that familiar shoulder ache I get on too-firm mattresses."
"Heavier side sleepers (75 kg+) might find the firmness fine — they sink into the Geltex layer enough. But if you're petite and a strict side sleeper, look at the Emma Hybrid Airgrid or check our best mattresses for side sleepers guide. The Geltex Miracoil Pillowtop variant (with extra plush layer) would also suit better than this standard one."
What's Inside: Layer by Layer
6 Layers, 31 cm of Build
Hand-Tufted Knitted Cover
Hand-TuftedPolyester / viscose blend
Hand-tufted finish anchors the upholstery layers and prevents shifting. Knitted top adds soft contact feel.
Geltex Pillowtop
Cooling TechGel-infused open-cell foam
The cooling layer. Geltex is more breathable than memory foam — about 30× more permeable to air per Silentnight's published data — and disperses body heat rather than trapping it.
Comfort Fillings
Comfort LayerHypoallergenic upholstery fibres
Soft transition layer that lets the Geltex cradle without bottoming out into the springs.
Miracoil Spring System
Zoned SupportContinuous-coil zoned spring core
Silentnight's signature support unit. Three zoned regions (head/shoulders, lumbar, hips/legs) with denser coils in the centre for back support. Edge-to-edge sleep surface, no roll-together.
Insulator & Reinforcement Pad
StabilityFelt + reinforced fabric
Sits between the spring unit and the base; protects the upholstery and anchors the unit.
Non-Slip Base Fabric
Base GripPolypropylene
Bottom face of the mattress; grips slatted bases and divan tops.
Allergen & Safety Information
Certifications, fire safety, and what allergy sufferers should know
Safety Certifications
- UK/EU Fire Safety Compliant
Meets BS 7177 and EU fire-resistance standards required for Irish-market mattresses. Fire barrier built into the cover.
- NBF Code of Practice
Silentnight is a member of the National Bed Federation and adheres to its hygiene, labelling, and materials code.
- Hypoallergenic Fillings
Silentnight markets the upholstery fillings as hypoallergenic — though as we note below, no mattress is truly allergy-proof.
Allergy & Hygiene Considerations
- Dust Mites
Hand-tufted construction with sealed upholstery means fewer accessible cavities for dust mites than older button-tufted Silentnight models. Use a washable mattress protector for best results.
- Cover Is Not Removable
Unlike the Emma Airgrid, the cover is fixed to the mattress (hand-tufting holds it in place). You can't unzip and machine-wash it — clean spot-only with a damp cloth and mild detergent.
- Off-Gassing
Mild upholstery / mineral-fibre smell for 2–3 nights, typically less intense than vacuum-rolled foam mattresses. Air the room for 24 hours.
Not hypoallergenic in the strict sense: Silentnight uses hypoallergenic-marketed fibres, but no mattress is truly allergen-proof. Pair with an anti-allergy mattress protector and pillowcases. If you have severe allergies, consult your GP or allergist first.
Long-Term Durability Testing: 6-Month Results
Most reviews stop at 30 days. We kept testing for 6 months — here's what happened.
6-Month Durability Report
The good: The Miracoil spring unit shows zero degradation at 6 months — no broken coils, no sag, no creaking. The Geltex pillowtop has held its loft and cooling performance. Hand-tufting still tight, no migration of upholstery fillings.
The watch-out: Edge support has weakened slightly (+0.3" sinkage). Body impression in the primary sleep zone is 0.5 cm — within industry norms, but worth flagging given the 5-year (rather than 10-year) warranty.
12-Month Update: In Progress
We're continuing to monitor at 12 months. Given the 5-year warranty, we'll update this section with year-one measurements when available.
Critical Evaluation: The Trade-Offs
Every mattress has weaknesses — here's what you need to know before buying
Edge Support Weakness
- Reduces usable sleep surface by ~10 cm per side
- Sitting on edge to dress feels unstable
- Most-cited complaint in user reviews
Trial & Warranty Trade-Off
The 60-night exchange-only trial and 5-year warranty are noticeably weaker than the direct-to-consumer brands. Emma offers 200-night refund + 10-year warranty; Simba and Eve are similar.
Mitigation:
Try in-store at Harvey Norman before buying. Lying on it for 10 minutes won't tell you everything, but it's better than committing blind to an exchange-only trial.
Motion Transfer
Continuous-coil Miracoil isn't as good at motion isolation as discrete pocket springs. Siobhán reported only 30–40% reduction in partner movement vs her old pocket-spring mattress.
Side Sleepers Under 65 kg
Petite side sleepers don't sink into the Geltex layer enough — the Miracoil firmness reads through and creates shoulder pressure. Aoife (65 kg) was right on the borderline; lighter sleepers will struggle.
Consider the Geltex Miracoil Pillowtop variant (extra plush layer) or a softer hybrid like the Emma Hybrid Airgrid.
Too Firm or Too Soft? What to Try Before Returning
Most firmness complaints can be addressed — and remember, you can't refund this mattress, only exchange.
Feels Too Firm?
- 1.Give it 2–3 weeks.
The upholstery layers compress and conform over the first fortnight. Don't judge it after one night.
- 2.Add a soft mattress topper.
A 5–7 cm memory foam or down-alternative topper softens the surface without losing the Miracoil support underneath. Quickest fix.
- 3.Exchange for the Pillowtop variant.
Within the 60-night window, you can swap to the Geltex Miracoil Pillowtop for a softer feel — same support unit, plusher surface.
- 4.Check your room temperature.
Foam runs firmer in cold rooms (under 16°C). Warm the bedroom slightly if you sleep in a cold bedroom.
Feels Too Soft?
- 1.Check your bed base.
A sagging or wide-slat base will soften any mattress. Lie it on the floor for one night — if it feels firmer, your base is the issue.
- 2.Add a firm latex topper.
A natural latex topper (3–5 cm) on top adds structure without changing the spring base. Effective for adding firmness.
- 3.Add board support underneath.
10 mm plywood or MDF between mattress and slats creates a firmer foundation. Cheap fix.
Critical: The 60-night comfort guarantee is exchange-only. Make your decision before day 60 — after that, you're stuck. See our full firmness guide.
Full Specifications & Measurements
Advertised specs vs our actual measurements
General Specifications
| Height (advertised) | 31 cm |
| Height (measured, break-in) | 30.6 cm — close to spec |
| Height (6 months) | 30.0 cm — 1.0 cm total loss |
| Firmness (advertised) | Medium / Firm |
| Firmness (measured, centre) | 6.5–7.0/10 |
| Type | Pocket-Sprung Hybrid (Miracoil + Geltex Pillowtop) |
| Max Weight per Side | ~120 kg per side (estimated, no published Silentnight figure) |
| Trial Period | 60-night exchange only |
| Warranty | 5 years |
| Delivery | Varies by retailer (typically 1–2 weeks) |
| Adjustable-Base Compatible | No (continuous-coil unit) |
| Cover | Hand-tufted, fixed (not removable) |
| Made In | UK (Silentnight, Lancashire) |
Layer Thickness Breakdown (Measured)
| Hand-Tufted Cover | 1.0 cm (hand-tufted) |
| Geltex Pillowtop | 3.0 cm |
| Comfort Fillings | 4.5 cm |
| Miracoil Spring Unit | 20 cm |
| Insulator + Base Fabric | 2.1 cm |
| Total (measured) | 30.6 cm |
Available Sizes — Dimensions & Weight
| Size | Advertised | Actual (Measured) | Weight | Delivery Format |
|---|---|---|---|---|
| Single | 90 × 190 cm | 89.5 × 189.5 cm | 26 kg | Flat-pack delivery |
| Small Double | 120 × 190 cm | 119.5 × 189.5 cm | 32 kg | Flat-pack delivery |
| Double | 135 × 190 cm | 134.5 × 189.5 cm | 37 kg | Flat-pack delivery |
| King | 150 × 200 cm | 149.5 × 199.5 cm | 44 kg | Flat-pack delivery |
| Super King | 180 × 200 cm | 179.5 × 199.5 cm | 52 kg | Flat-pack delivery |
Actual dimensions measured 24 hours after delivery. Standard industry tolerance ~0.5 cm under spec. Spring count varies internally — Silentnight does not publish a public coil count for the Miracoil unit; it uses a continuous-coil rather than discrete pocket-spring system.
Pricing & Buyer's Essentials
Current Deals at Verified Irish Stockists
Oxendales.ie regularly runs sale pricing across the Geltex Miracoil range — confirmed pricing at the time of writing was €447.50 (Single) up to €632.50 (Super King). Harvey Norman.ie pricing varies seasonally, and they often run trade-in promotions where you get a discount for handing in your old mattress.
Tip: Check both retailers before buying. Oxendales typically wins on price; Harvey Norman wins if you want to lie on it first or arrange next-day delivery.
Price Guide (Irish Market — Oxendales.ie verified)
Sale pricing as confirmed during testing — verify current prices at the retailer
| Size | Dimensions | Typical RRP | Oxendales Sale Price |
|---|---|---|---|
| Single | 90 × 190 cm | €549 | €447.50 |
| Small Double | 120 × 190 cm | €619 | €499 |
| Double | 135 × 190 cm | €699 | €549 |
| King | 150 × 200 cm | €789 | €599 |
| Super King | 180 × 200 cm | €859 | €632.50 |
RRP figures are typical retail benchmarks. Sale prices reflect Oxendales.ie pricing observed during testing.
What's Included
- 60-Night Comfort Guarantee: Exchange-only, not a refund. You can swap for a different Silentnight model within 60 nights if you don't get on with it. Read more about mattress trial policies in Ireland.
- 5-Year Warranty: Covers manufacturing defects (broken springs, split seams, sagging beyond 2.5 cm). Does not cover normal wear or comfort preference.
- Doorstep Delivery: Standard with both Oxendales and Harvey Norman; typically free or low-cost across Ireland depending on retailer. Lead time 1–2 weeks.
- Old Mattress Removal: Harvey Norman regularly offers paid disposal of your old mattress at delivery. Worth budgeting €30–50 for.
Before You Buy
- Trial is exchange-only. You cannot get a refund. Be sure before you buy — try it in-store at Harvey Norman first if you can.
- Rotate every 3 months. Head-to-foot rotation is required for warranty compliance. See our mattress care guide.
- Not for adjustable beds. The continuous-coil Miracoil unit cannot articulate. Don't buy this if you have an electric base.
- Check the variant. The Pillowtop version is softer. Read the FAQ to make sure you're buying the right one.
How the Trial & Warranty Actually Work
The 60-night exchange policy and 5-year warranty are the most-misunderstood parts of this purchase
60-Night Comfort Guarantee — Exchange Process
- 1Sleep on it for at least 30 nights first.
The retailer (Oxendales or Harvey Norman) will typically require a minimum break-in period before processing an exchange — confirm with your retailer at purchase.
- 2Contact your retailer's customer service before day 60.
The 60-night clock runs from delivery date. Both Oxendales and Harvey Norman handle the exchange, not Silentnight directly. Have your order number ready.
- 3Choose a different Silentnight model.
You can exchange for any Silentnight mattress at the same or higher price. Common upgrade paths: from standard Geltex Miracoil → Geltex Miracoil Pillowtop (for softer feel), or from Miracoil → pocket-spring Silentnight ranges (for better motion isolation).
- 4Pay any price difference and exchange.
If you swap to a more expensive model, you pay the difference. If you swap to a cheaper one, retailer policies vary — most don't refund the difference. Collection of the old mattress is typically free; check at the time.
Critical: No cash refund is available under the comfort guarantee. If you change your mind entirely, you're stuck with the mattress (or any Silentnight replacement). Read the retailer's specific policy at checkout.
5-Year Warranty: What's Covered
Covered
- • Sagging or indentation greater than 2.5 cm under no weight
- • Broken Miracoil springs or wire failure
- • Manufacturing defects in cover, stitching, or hand-tufting
- • Foam splitting or cracking under normal use
Not Covered
- • Normal wear and gradual softening
- • Stains, mould, liquid damage
- • Damage from incompatible bases (slats too far apart, adjustable frames)
- • Comfort preference changes
- • Use beyond 5 years (warranty length is half what direct-to-consumer brands offer)
Warranty claims go through your retailer first (Oxendales or Harvey Norman), not directly to Silentnight. Keep your order confirmation and any photos of defects. Inspection visits or photo evidence may be required.
Customer Support Contacts
Oxendales.ie
Customer service handles trial exchanges and warranty claims for Oxendales orders.
Via Oxendales.ie contact form
Harvey Norman Ireland
In-store team handles trial swaps and warranty for Harvey Norman purchases.
Via your local Harvey Norman branch
Silentnight Geltex Miracoil vs the Competition
How it stacks up against the most popular alternatives in Ireland
| Feature | Silentnight Geltex Miracoil | Emma Hybrid Airgrid | Emma Original | Sealy Posturepedic Elevate | IKEA ÖNNELAND Hybrid |
|---|---|---|---|---|---|
| Firmness | Medium/Firm | Medium-Soft | Medium | Medium-Firm | Medium |
| Height | 31 cm | 27 cm | 25 cm | 29 cm | 25 cm |
| Trial | 60 nights (exchange) | 200 nights (refund) | 200 nights (refund) | Retailer-dependent | 365 nights (exchange) |
| Warranty | 5 years | 10 years | 10 years | 5 years | 10 years |
| Price (IE) | €450–€700 | €500–€1,100 | €350–€700 | €600–€1,000 | €199–€399 |
| Cooling | Very Good | Excellent | Good | Good | Average |
Choose the Geltex Miracoil if…
- • You're a back sleeper or stomach sleeper
- • You have lower back issues and want firm lumbar support
- • You sleep hot but don't need extreme cooling
- • You're 70 kg+ and want a properly firm mattress
- • You're happy to commit (you can't refund the trial)
Consider Alternatives if…
- • You're a side sleeper under 65 kg → Emma Hybrid Airgrid
- • You want a refund-trial in case you don't like it → Emma (200-night refund)
- • You have an adjustable bed base → any non-Miracoil hybrid
- • You share a bed with a restless partner → pocket-spring hybrid
- • You want budget-tier value → IKEA ÖNNELAND Hybrid
Where to Buy in Ireland
Verified Irish stockists only — Silentnight has limited Irish distribution compared to UK availability
Online (Republic of Ireland Delivery)
- Oxendales.ie
Best price we found during testing — €447.50–€632.50 across all sizes. Delivers to all 32 counties. Standard doorstep delivery; pay extra for room-of-choice on larger sizes.
Visit Oxendales.ie - Harvey Norman.ie
Online ordering with showroom backup. Pricing varies seasonally; trade-in promotions sometimes available. Delivers across Ireland with optional old-mattress disposal.
Visit HarveyNorman.ie
In-Store (Try Before You Buy)
Given the trial is exchange-only, lying on the mattress in person before buying is genuinely worth the trip.
- Harvey Norman Dublin:
Swords, Carrickmines, Tallaght, Blanchardstown showrooms — all stock Silentnight ranges. See our best mattress stores in Dublin guide.
- Harvey Norman Cork:
Little Island showroom on the city ring road. Usually has multiple Silentnight floor models.
- Harvey Norman Galway & Limerick:
Both stock the Geltex range. Ring ahead to confirm Geltex Miracoil specifically is on display.
Limited Irish stockist network: Compared with UK availability (Dreams, Bensons, John Lewis, Argos all stock Silentnight), Irish distribution is much narrower. Stick with the two verified stockists above — be cautious of grey-market UK sellers shipping to Ireland, as warranty claims become messy.
Sustainability & Environmental Impact
Where Silentnight stands on materials, manufacturing, and end-of-life
Silentnight's Sustainability Credentials
Silentnight has made meaningful sustainability progress over the past decade, particularly around recycled-bottle filling and UK-based manufacturing.
- UK Manufacturing: All Silentnight mattresses are made in Lancashire, England — a much shorter freight footprint to Ireland than imports from continental Europe or the US.
- Eco Comfort Fibres: Some Silentnight ranges use recycled plastic bottle filling — confirm with the retailer whether this specific Geltex Miracoil model uses Eco Comfort filling.
- Mattress Recycling: Silentnight participates in UK National Bed Federation recycling. In Ireland, several local-authority schemes accept mattresses for recycling — check your county council.
- Flat-Pack Delivery: The mattress isn't vacuum-rolled, which avoids the plastic-heavy compression packaging used by box-bed brands. Less plastic per delivery.
- Watch-out: The Geltex foam layer and synthetic upholstery aren't biodegradable. The Miracoil spring unit is recyclable as scrap steel at end of life.
Is the Silentnight Geltex Miracoil Right for You?
Six quick questions, honest scoring — no marketing nonsense
What's your primary sleep position?
Frequently Asked Questions
The questions Irish buyers actually ask before pulling the trigger
Final Verdict
From Seán, our lead reviewer, after six months on the Silentnight Geltex Miracoil
Six months on, the Silentnight Geltex Miracoil sits in our spare room as a regular guest mattress, and it earns its place. Ciarán still rates it as the best back-supporting mattress he's slept on in three years. Oisín still calls it the only hybrid he didn't sink through. Those two things alone make it a strong recommendation for back sleepers, stomach sleepers, and anyone whose lower back gives them grief.
But this isn't a universal recommendation. The 60-night exchange-only trial is a real downside compared with the 200-night refund trials from Emma, Simba, and Eve. The 5-year warranty is half the industry norm at this price point. Edge support is genuinely weak. Motion isolation lags pocket-spring rivals. And if you're a side sleeper under 65 kg, you'll find it firm in all the wrong ways. None of that is fatal — but you should know it before you click buy.
The Geltex pillowtop is the unsung star of this mattress. After six months it still runs cool, still recovers fully, and still does its job. Pair that with the Miracoil zoned support and you've got a properly engineered mid-range hybrid that does what it says on the tin. At €447–€632 from Oxendales, the value-for-money case is strong if your sleep profile fits.
If you're a back-pain sufferer, a back or stomach sleeper, you sleep moderately hot, and you can commit without needing a refund safety net — this is one of the best mid-range mattresses you can buy in Ireland right now. If any of those don't apply, take the quiz above, read the comparison table, and make sure this is the right pick before you part with the money.
Verified Irish stockist • €447.50–€632.50 across sizes