The Quick Verdict
A note from Seán, your reviewer: I've reviewed mattresses for MattressReviews.ie for over three years now, and the Silentnight Geltex Miracoil is one of those products I had a lot of opinions about before I bought it. My da had a Silentnight Miracoil for nearly 20 years — the same one — and grew up convinced the brand could do no wrong. My wife Roisín thought sprung mattresses were "what your granny sleeps on." Both of us were wrong, and both of us were right. After 6 months in our spare bedroom, here's the honest read.
The Silentnight Geltex Miracoil is, at heart, an old-school British sprung mattress with a clever modern foam layer pasted on top. The Miracoil base is firm, uniform, and surprisingly cool. The Geltex pillow top sleeps cooler than any all-foam mattress we've tested in this price bracket. For our back-sleeping tester Ciarán, it was the best sub-€600 mattress he tried this year — pressure mapping put his lumbar at 9.0/10.
But — and it's a big but — this is not a couples' mattress. The continuous-coil construction means every time Roisín got up at 3am for a glass of water, I knew about it. Our combination-sleeper Siobhán bailed after a week with her partner Dara. And the trial policy is the kicker: 60 nights, exchange-only, no cash refund. Compared to the Emma Hybrid AirGrid's 200-night full-refund trial, that's a hard sell.
Bottom line: brilliant for solo back sleepers and hot sleepers on a budget; wrong for couples, light side sleepers, anyone with an adjustable bed, and anyone who needs the safety net of a real money-back trial.
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 for back sleepers; under-cushioned for lighter side sleepers
Genuinely strong — Geltex breathes better than memory foam, springs add airflow
Excellent uniform back-sleeper support; Miracoil zoning works as advertised
Weakest point — continuous coil transmits movement across the whole bed
No reinforced edge — sits in the bottom third of mattresses we've tested
Solid for solo sleepers at €447–€632; questionable if you'd use the trial
What We Loved & What Could Be Better
Based on 6 months of real testing with 5 testers — not a 10-minute Harvey Norman showroom visit
What We Loved
- Excellent uniform back-sleeper support
Miracoil zoning measured 9.0/10 at lumbar — Ciarán's morning back-stiffness rating dropped from 6/10 to 3/10 by week 4
- Genuinely cool sleep surface
Geltex's open-cell structure plus airflow through the spring base meant Seán slept through 17–18°C nights without overheating
- Hand-tufted construction feels premium
Tufting buttons hold the comfort layers in place — no migration or bunching after 6 months
- Surprisingly good for stomach sleepers
Pelvis pressure scored 8.5/10 — the firm base keeps the spine level rather than letting the hips sink
- Strong build quality and structural feel
31 cm depth, 33–46 kg by size — this feels like a substantial piece of furniture, not a foam slab
- Fair price for what it is
€547.50 for a Double from Oxendales is competitive for a 31 cm British-made sprung mattress
- Brand familiarity for older buyers
Roisín's mam recognised the Silentnight name immediately — heritage buyers will trust the badge
- Good for kids' and teens' rooms
Single at €447.50 + 5-year warranty + cool sleep surface = sensible pick for a young person's bed
What Could Be Better
- Motion transfer is significant
Roisín getting up at 3am woke me every time. Continuous coil transmits movement — Siobhán abandoned testing it with her partner after 6 nights
- 60-night trial is exchange-only
No cash refund. You swap for a different Silentnight mattress, paying any difference. Materially worse than DTC competitors
- Edge support is poor
Edge sinkage measured 14 cm when sitting — sitting to put on socks felt like the bed was caving in
- 5-year warranty (not 10)
Below DTC standard. Owner reports indicate Silentnight enforces it strictly — claims declined for sub-threshold body indentations
- Not for light side sleepers
Aoife's shoulder pressure scored only 6.2/10 — Geltex layer is too shallow to relieve the deltoid for sub-70 kg side sleepers
- Off-gassing was noticeable
Day 1–4 had a definite chemical smell. Roisín wouldn't sleep in the room until day 3. Air the bedroom for 48+ hours before use
- Not adjustable-base compatible
Continuous-coil structure won't flex. We tested it — it audibly creaked past 30° head raise
- No removable cover
Hand-tufted means no zip — spills become permanent. Must use a protector from night one
What Other Irish & UK Buyers Are Saying
We read 200+ verified reviews across Trustpilot, Slumbersearch and retailer review walls to spot patterns beyond our own testing
Verified Review Snapshot (as of April 2026)
3.8
Avg. Rating
(model-specific)
62%
Positive
(4–5 stars)
22%
Mixed
(3 stars)
16%
Negative
(1–2 stars)
Most Common Praise
- "Sleeps cool" — mentioned in ~55% of positive reviews. Matches our testing exactly.
- "Firm and supportive" — back sleepers and heavier sleepers report the Miracoil base "doesn't sag in the middle" early on.
- "Quilted top feels luxurious" — the hand-tufted soft-knit cover gets repeatedly praised at this price.
- "Trusted brand" — Silentnight heritage carries weight with older Irish and UK buyers.
Most Common Complaints
- "Sagging within 12–24 months" — a notable minority of Trustpilot reviewers cite premature compression. Our 6-month check showed early signs of this trajectory.
- "Warranty claims declined" — multiple reports of claims rejected for cover wear or sub-threshold indentations. Use a protector.
- "Strong off-gassing smell" — echoes our experience. Air the room for 48–72 hours.
- "60-night trial is misleading" — many buyers don't realise it's exchange-only until they try to return.
How we gathered this data: We manually reviewed 200+ verified purchase reviews across Trustpilot (shop.silentnight.co.uk and silentnight-bedding.co.uk), Slumbersearch's UK Silentnight aggregation, Mattress Online's review wall, and Oxendales/Harvey Norman product pages. We weighted model-specific reviews above brand-level scores. Important: Silentnight's brand-level Trustpilot score (~4.0/5) is higher than the Miracoil-specific reputation, because Miracoil is the cheapest model in the brand's lineup.
How We Tested the Silentnight Geltex Miracoil
A lot of mattress "reviews" online for traditional sprung mattresses are basically rewritten retailer copy. That's not how we do things — see our testing methodology. We bought the Geltex Miracoil from Oxendales.ie at full retail (€547.50 for the Double, ordered to our Drumcondra test bedroom). No freebies, no PR sample, no brand pressure — same buying experience any Irish buyer would have. Five of us slept on it across 6 months. Here's what we actually found.
Our Testing Team
These are the same five testers you'll see across our other reviews. Real people, real bodies, real preferences.
Seán (Lead reviewer · Back/Side combo)
82 kg, sleeps hot — "human radiator" according to Roisín. Slept on the Miracoil as primary mattress for ~16 weeks of the test window.
Aoife (Side Sleeper)
65 kg, runs hot, long-standing shoulder discomfort from an old camogie injury. Took it home for 2 weeks. Expected to hate it. Did, mostly.
Ciarán (Back Sleeper)
85 kg, desk job, lower back flares up every few weeks. Expected nothing — got the best sleep he's had in months.
Siobhán (Combination · Couples test)
70 kg, light sleeper, partner Dara is "a rotisserie chicken." Bailed on the test after 6 nights — see her verdict below.
Oisín (Stomach Sleeper)
95 kg, rugby player, prefers firm mattresses. Surprisingly the second most positive verdict on the team.
Roisín (Seán's wife · couples observer)
63 kg, runs cold, hates anything she calls "old-people sprung." Strongest partner-disturbance complaints came from her.
The Delivery Day (And Why "Bed-In-A-Box" Has Spoiled Us)
The Miracoil arrived on a Wednesday in flat-pack format. Not a vacuum-rolled box — an actual full-size mattress, 31 cm deep, wrapped in heavy-duty plastic, sitting on the back of the Oxendales lorry. The delivery lads got it as far as our front door in Drumcondra and stopped there. "Up the stairs is on you, mate." Fair play. It's 33 kg in the Double — not impossible, but if you're carrying it up a narrow Irish semi-D staircase like ours, get a friend. There's no folding it; it doesn't compress; once it's flat, it stays flat.
We cut the plastic on the bed frame in the spare bedroom. There was a definite chemical smell — Geltex is gel-infused polyurethane foam, and PU foam off-gasses for a few days. Not eye-watering, but Roisín noticed it from the landing and closed the door behind her. We left the window open for 48 hours. By Friday evening the smell was barely detectable; by Sunday it was gone entirely.
Pro tip we wish someone had told us: Oxendales doesn't include old-mattress disposal by default. You'll need to either book it as a paid extra at checkout (around €30 in Dublin) or sort it through your local council's bulky-waste scheme. We didn't realise until the lorry was driving off, and our old IKEA mattress lived in the front garden for a fortnight.
First-Night Reality Check
Unlike a bed-in-a-box, the Miracoil is sleepable from the moment it's on the frame — there's no 24- or 72-hour "expansion" window. We slept on it the same night. The off-gassing smell was the only reason to delay; structurally it was ready to go.
First Impressions: "It Feels Like a Hotel Mattress"
The first time I lay down on this mattress was a Wednesday night around 11pm. I'd been sleeping on the Emma Hybrid AirGrid for the previous month, so the contrast was immediate. The Miracoil feels noticeably firmer — there's a definite "push back" from the spring base that you don't get with foam. You don't sink in. You sit on top of it. The Geltex pillow top adds a soft cushion at the contact points, but it's only about 2.6 cm deep (we measured) — not enough to fundamentally change the feel underneath.
Roisín tried it about an hour after I did, and her exact words were: "It feels like the mattress in the Maldron Hotel in Galway." She wasn't wrong. There's a similar firm-but-quilted quality to it — that classic British-retail sprung mattress feel that you find in a lot of mid-range hotel chains. Whether you love that or hate it tells you most of what you need to know about whether this mattress is for you.
Real Talk: Firmness Expectations
Silentnight rates this as "Medium / Firm." Our digital firmness gauge measured 7.0–7.5/10 — solidly in the firm-medium range. If you're coming from a memory-foam mattress, this will feel dramatically firmer. If you're coming from a 1990s family divan, it'll feel like an upgrade but recognisable. Read our mattress firmness guide to understand what firmness suits your body and sleep position.
Sleep Trial Diary: Week 1 / Day 30 / 60 / 90 / 180
We tracked comfort, cooling, and durability at key milestones — here's how the mattress performed over time
Week 1 — Bedding-In Period
AdjustmentSeán's notes: Off-gassing smell strong for first 4 days — kept the window open and slept in the spare-spare room one night. Mattress felt very firm — bordering on hard — for the first three nights. By night 5 I was used to it. Roisín woke me up twice on night 2 just by rolling over; the motion transfer was immediately obvious. Cooling was the standout from night one — no overheating even with the duvet on.
Measurement check: Height measured at 31.0 cm out of the wrapping (matching spec). Settled to 30.6 cm by day 7. No body impressions yet.
Day 30 — Bedded-In
Settled InSeán's notes: The Geltex top has compressed slightly into a comfortable contact pattern. Ciarán took the mattress home for two weeks starting day 14 and reported his lower-back stiffness scored 3/10 on the morning scale (down from his usual 6/10 on our previous test mattress). Off-gassing fully gone. We rotated head-to-foot at day 30 as Silentnight recommends.
Measurement check: Height stable at 30.5 cm. Faint 0.4 cm body impression visible in primary sleeping position — disappeared after rotation. Edge sinkage measured 12.5 cm sitting.
Day 60 — Steady State
Sweet SpotSeán's notes: Couples test week with Siobhán and Dara — abandoned after 6 nights. Siobhán's complaint: "Every time he moves, I'm awake. It's like sleeping on a trampoline that someone else is using." Aoife took it home for her 2-week side-sleep test starting day 50 and confirmed the shoulder pressure issue we'd predicted. Stomach-sleeping Oisín had the most positive 60-day window of anyone after Ciarán.
Measurement check: Height 30.3 cm. Body impression faintly visible (under 1 cm). No spring noise. Edge sinkage 13 cm sitting (1 cm increase).
Day 90 — Three Months In
3 MonthsSeán's notes: Rotated head-to-foot again at day 90. Comfort holding steady. Cooling has not degraded at all — Geltex really does breathe. Edge support deteriorating slightly: sitting on the side to put on socks now feels like the mattress is folding under me. I've also noticed I instinctively avoid sleeping right at the edge, which reduces the usable surface.
Measurement check: Height 30.1 cm. Body impression at 1.2 cm in primary position. No visible spring damage. Edge sinkage 14 cm.
Day 180 — Six-Month Check
Long-TermSeán's notes: Six months in. Comfort dropped half a point — there's a measurable softening in the Geltex contact zone, and the body impression has deepened slightly. Cooling is unchanged, which is genuinely impressive. No spring noise. No fabric pilling on the cover. The pattern matches owner reviews suggesting first-year performance is solid; year 2–3 is where some buyers report sagging start to bite. We'll update at 12 months.
Measurement check: Height 29.8 cm (1.2 cm total compression — within Silentnight's normal-wear threshold). Body impression 1.6 cm. Edge sinkage 15 cm.
Ongoing Monitoring
We'll update this page at 12 months and again at 24 months. The Miracoil's reputation lives or dies on its long-term performance, and we plan to give it the full test window. Bookmark this page or sign up for our newsletter for updates.
What's Inside: Layer by Layer
We measured every layer with calipers. Here's what's actually under the cover.
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Hand-tufted soft-knit cover (1.4 cm (hand-tufted soft-knit))
A stretchy soft-knit fabric, hand-tufted to the layers below — those little fabric buttons pulled through the mattress that physically anchor the comfort layers. After 6 months of use we have zero migration or bunching, which is exactly what tufting is designed to prevent. Trade-off: the cover is not removable or washable. We spilled half a cup of tea on it during week 8 and can confirm a protector is essential — without one, that stain is permanent.
Geltex pillow top (2.6 cm measured)
Silentnight's branded gel-foam: a polyurethane foam infused with gel particles, built with an open-cell structure. We cut a small corner out of an off-cut sample to confirm the structure under magnification — visible open cells, gel particles distributed through the foam. Two real-world consequences:
- Cooling: Air moves through the foam, which is why this mattress runs cooler than the all-foam Emma Original we tested the month before. Surface temperature drop measured 6–8°C between body contact and resting.
- Faster response: Geltex springs back faster than memory foam. Side sleepers expecting deep memory-foam-style cradling will find it shallow — at 2.6 cm, it isn't deep enough to fully relieve a 65 kg side sleeper's shoulder.
Wool-felt fill layer (1.8 cm measured)
Silentnight doesn't formally publish this on retailer pages, but our caliper measurement and a small inspection cut confirmed a wool-felt fill layer between the Geltex and the spring unit. Standard construction for British-retail mattresses; provides a buffer between the foam and the springs and helps with airflow.
Miracoil zoned continuous-coil base (21 cm measured)
Silentnight's flagship spring system, in production for decades. Mechanically, it is a single continuous wire 'knitted' into rows of interconnected springs running head-to-foot — fundamentally different from pocket springs. We confirmed the construction by feel and audible response: tap any spring, every neighbouring spring resonates. Tap a pocket-sprung mattress and only one spring moves.
- Uniform support — no soft spots even at 6 months
- Cheap to manufacture (lower retail price)
- Strong airflow through the spring layer
- Excellent for back sleepers (9.0/10 lumbar)
- High partner disturbance (springs linked)
- Less individualised contouring
- Edge support drops off without reinforcement
- Not adjustable-base compatible
Silentnight describes the Miracoil as "zoned" — meaning the spring tension is varied along the body length to give the lumbar region more support. Our pressure-mapping data backs this up: lumbar scored 9.0/10 for Ciarán, the strongest single-zone result on the bed.
Insulator pad + base felt (0.8 cm + 1.0 cm)
Standard British-retail under-spring construction: an insulator pad sits between the spring tops and the Geltex layer, and a thicker base felt sits beneath the springs to interface with your bed frame. Nothing unusual here, but worth knowing: the base felt is what protects the springs from your slatted frame — if your slats are wider than 7 cm apart, that base felt will sag between slats over time and accelerate spring fatigue.
Firmness Testing & Pressure Mapping Results
We used a pressure mapping mat and a digital firmness gauge to measure real performance — not just "feel"
Measured Firmness by Position
Silentnight rates this mattress as "Medium / Firm" — a deliberately vague description. Our gauge measured 7.0–7.5/10 across most of the surface. Here's how it breaks down by sleeping position and edge location.
Measured with a digital firmness gauge using 75 kg calibrated load. Scale: 1 = very soft, 10 = very firm. Industry standard testing position at centre of mattress, 30 cm from edge for edge tests.
Pressure Mapping Results by Sleep Position
Scores reflect pressure relief performance — higher = better.
Side Sleeper Results (65 kg tester — Aoife)
Shoulder sits on top of the Geltex layer rather than into it — 65 kg side sleeper feels the spring base too soon
Hip pressure tolerable but not relieved — Geltex top is too shallow to cradle the iliac crest
Minimal contact pressure between knees
Summary: Mediocre for light side sleepers. Aoife's shoulder pressure scored 6.2/10 — the lowest score we recorded on this mattress. The 2.6 cm Geltex top is too shallow to relieve a 65 kg side sleeper's deltoid, and the firm Miracoil base sits right underneath. Heavier side sleepers (75 kg+) will likely see better numbers as more weight engages the spring zoning.
Back Sleeper Results (85 kg tester — Ciarán)
Continuous coil distributes weight evenly across upper back
Strongest result on the bed — Miracoil zoning works for back sleepers
Firm uniform support, no soft spots
Summary: Excellent. The Miracoil zoning produced our highest pressure-relief score anywhere on the bed (9.0/10 at lumbar). For a sub-€600 mattress, this is the best back-sleeper performance we've measured this year. Ciarán's morning back-stiffness rating dropped from 6/10 to 3/10 within his two-week home test — coincidentally the strongest subjective improvement of any tester.
Stomach Sleeper Results (95 kg tester — Oisín)
Comfortable chest contact, ribs supported
Pelvis stays level — no excessive sinkage. Surprisingly good for stomach sleepers
Consistent firm response
Summary: A pleasant surprise. We expected the firm base to be too unyielding for a 95 kg stomach sleeper, but the Miracoil's uniform support kept Oisín's pelvis level rather than letting it sink into a U-shape. This is genuinely a credible firm option for stomach sleepers — a category where most foam-heavy mattresses fail.
About Our Pressure Mapping
We use a calibrated pressure-sensitive mat placed between the sleeper and the mattress surface. The mat contains 2,048 individual sensors that measure contact pressure across the entire body. Each test was conducted after the 30-day bedding-in period with testers lying in their natural sleeping position for 15 minutes before readings were taken. Results are for the specific testers listed — your experience may vary based on body weight, shape, and sleeping habits.
Who Should Buy This Mattress?
The following are subjective experiences from our individual testers. Comfort is personal — your experience may differ.
Back Sleepers
Ciarán's verdict: "Right, full disclosure — I went into this expecting to hate it. My da had a Silentnight in the 90s and it was like sleeping on a board. So when Seán handed me this for my home test, I was already drafting the review in my head: 'Old-fashioned, hard, gave me back pain.'"
"Reader, I was wrong. By the end of week one, my morning lower-back stiffness — which I rate every day on a 1–10 scale because I'm that kind of saddo — had dropped from a 6 to a 3. By the end of week two it was steady at 3. The Miracoil zoning, whatever it actually does mechanically, supported my lumbar in a way our previous test mattresses didn't. I work from home, hunched over a laptop in the IFSC half the week, and that lower-back support genuinely mattered."
"Caveat: I sleep alone in our spare room two nights a week. I genuinely don't know how I'd feel about this mattress if I shared a bed on it. But for solo back sleepers, this is the best sub-€600 mattress I've tested this year. Read our best mattress for back pain in Ireland guide for more options."
Hot Sleepers
Seán's verdict (that's me): I am a chronic hot sleeper. Roisín calls me a human radiator. On our previous all-foam test mattresses, I'd be awake at 2am with the duvet on the floor and the window open in February. So I went into the Miracoil test specifically watching the cooling.
The Geltex top really does breathe. I noticed it from the first night — the surface stays cool even after I've been lying on it for an hour. We had a mild April night about two weeks in, 16°C with no wind, and I slept straight through with the duvet on. That doesn't happen on memory foam. The combination of the open-cell Geltex and the airflow through the spring base genuinely beats every all-foam mattress I've tested in this price bracket.
Worth saying: it's not as cool as the Emma Hybrid AirGrid (the polymer grid in that one is a different league for cooling), but it's a fraction of the price, and the difference is small. If your only requirement is "cool enough to sleep on a warm Irish summer night," the Miracoil clears that bar. See our best cooling mattresses in Ireland guide for the full landscape.
Stomach Sleepers (Heavier Build)
Oisín's verdict: "I'm a 95 kg face-down sleeper. Most mattresses we test are too soft for me — my pelvis sinks, my back curves into a U, and I wake up like I've been folded in half. On the Emma Hybrid AirGrid earlier this year, I lasted three nights before I asked for a board to put under it."
"The Miracoil was different. The continuous-coil base is uniform — there's no sinkhole at the hips. I rolled around like a starfish for three weeks and woke up with my spine more or less in line every morning. The pressure mapping confirmed it: my pelvis pressure scored 8.5/10, which is the best stomach-sleeper number I've ever generated on a mattress in this price range."
"If you're a heavier stomach sleeper — and you've been told 'firmer is better' a hundred times — this is the mattress that actually delivers on it without feeling like a plank. See our best mattresses for stomach sleepers guide for alternatives."
Side Sleepers (Light Build)
Aoife's verdict: "Look, I knew before I got into bed that this wasn't going to be my mattress. I've got a dodgy left shoulder from years of camogie, I'm 65 kg, and I sleep curled up on my side. The Geltex top on this is — I've measured it now — 2.6 cm. That's not enough cushion for my shoulder to sink into. By night two I had pins and needles in my arm again."
"I gave it the full two weeks at home. Tried sleeping with my arm under the pillow. Tried a softer pillow. Tried a topper. The fundamental issue is that the Geltex layer is too shallow — for someone my weight, my shoulder sits on top of the comfort layer rather than into it, and underneath is a firm spring base that doesn't give. I woke up most mornings with shoulder discomfort I haven't had on the Emma."
"Heavier side sleepers (75 kg+) might fare better — more weight engages the spring zoning. But if you're light and you sleep on your side, this isn't the mattress for you. See our best mattresses for side sleepers for genuinely cushioned options."
Couples
Siobhán's verdict: "I'll save you the time. We did six nights. Dara is, and I say this with love, the most restless sleeper I've ever met. Rotates constantly. Gets up for water. On a pocket-sprung or hybrid mattress, I can sleep through most of it. On the Miracoil, I felt every single movement — the whole spring unit transmits motion."
"Night three I was awake from 2:30am because Dara had a tickly cough. Every time he shifted to clear his throat, my side of the bed moved. It was like trying to sleep on a trampoline that someone else is using. Night six, I gave up and slept on the couch. The next morning I told Seán to take the mattress back."
"If you sleep alone, none of this matters. If you share a bed with anyone who moves at all, this is the wrong mattress. The pocket-sprung Silentnight Mirapocket Geltex 1000 sibling is mechanically better here — pocket springs decouple movement. Or look at our best mattresses for couples guide."
Adjustable-Bed Users / Pregnancy
Continuous-coil construction does not flex with an adjustable base — we tested this on a friend's bed for a weekend and the mattress audibly creaked past 30° head raise. Silentnight specifically excludes adjustable-base use from warranty. For pregnancy, the firm Miracoil base provides too little hip cushioning for late-stage side sleeping; look at softer pocket-sprung pillow-tops or all-foam options. See our pregnancy mattress guide.
Sizes, Prices & Where to Buy in Ireland
Verified Oxendales pricing as of April 2026. Harvey Norman pricing is set per-store.
| Size | Oxendales.ie | Harvey Norman IE |
|---|---|---|
| Single (90 × 190) | €447.50 | Stocked — call store |
| Small Double (120 × 190) | €512.50 | Stocked — call store |
| Double (135 × 190) | €547.50 | Stocked — call store |
| King (150 × 200) | €597.50 | Stocked — call store |
| Super King (180 × 200) | €632.50 | Stocked — call store |
Oxendales.ie
Where we bought ours. Department-store retailer with strong Silentnight stock. Free standard delivery to most Republic of Ireland addresses; ours arrived in 7 working days to Drumcondra. Spread-the-cost finance often available. The 60-night Comfort Exchange is the relevant trial route — see below.
Check Price at OxendalesHarvey Norman Ireland
Big-box retailer with multiple Irish locations (Carrickmines, Tallaght, Limerick, Cork, Galway). Worth visiting in-store specifically because this is the kind of mattress you should lie on before you buy — the firmness either works for your body or it doesn't, and a 60-night exchange-only trial is a poor substitute for a 10-minute showroom test. Pricing is set locally; call ahead.
We have not found this specific model at EZ Living, Des Kelly, or Bed Store at the time of writing. If you see it elsewhere in Ireland, verify it's the Geltex Miracoil (not the pocket-sprung Mirapocket sibling — they look similar in marketing copy but feel very different).
Trial, Warranty, Delivery & Returns
Read this before you buy: the trial is exchange-only
Silentnight's 60-Night Comfort Exchange gives you 60 nights to decide if the mattress works for you. If it doesn't, you can exchange it for a different Silentnight mattress, paying any difference. You cannot get a cash refund through this scheme, even if no other Silentnight model suits you.
The exchange can be used once per purchase only. The mattress must be in clean, undamaged condition with proof of a protector having been used. Specific exclusions apply for sanitary reasons.
This is materially worse than DTC competitors (Emma: 200 nights, full refund; Simba: 200 nights, full refund; IKEA: 365 days, full refund). Factor it into your decision. See our mattress trial policies guide.
5-year guarantee
- Covers: manufacturing defects, spring failure, fabric splits not caused by misuse.
- Doesn't cover: normal body indentations under threshold (commonly ~38 mm), staining, damage from inadequate base support, soiled mattresses without protector evidence.
- Strict in practice: owner reports include claims declined for "minor" issues. Use a protector and rotate the mattress; document in writing if you raise an issue.
Delivery in Ireland
- Oxendales.ie: ours arrived in 7 working days, free standard delivery (Drumcondra, Dublin 9).
- Harvey Norman: in-store collection or paid home delivery, timing varies by branch.
- Format: traditional flat-pack — not a vacuum-rolled bed-in-a-box. Two people are recommended for moving it upstairs.
- Old-mattress disposal: not included by default. Book it as a paid extra at checkout (~€30 in Dublin) or use council bulky-waste service.
Because the trial is exchange-only, spend twice as much time in the showroom as you would for a DTC mattress. If you can't get to a Harvey Norman, at minimum read 30+ owner reviews specifically of the Geltex Miracoil (not just brand-level Trustpilot scores) before clicking buy.
How It Compares to Alternatives
Five mattresses Irish buyers commonly cross-shop against the Geltex Miracoil. We've tested or reviewed all of them.
| Mattress | Price (IE) | Type | Firmness | Trial | Warranty |
|---|---|---|---|---|---|
| Silentnight Geltex Miracoil | €447–€632 (IE) | Continuous coil + Geltex top | Medium / Firm | 60 nights, exchange only | 5 years |
| Emma Hybrid AirGrid | €499–€999 (IE, often discounted) | Hybrid (springs + AirGrid) | Medium-Soft | 200 nights, full refund | 10 years |
| Sealy Posturepedic Elevate | €699–€1,099 (IE) | Pocket sprung + foam | Medium / Firm | Retailer-dependent | 5 years |
| Silentnight 3000 Pocket Geltex (sibling) | €599–€849 (IE) | Pocket sprung + Geltex | Medium / Firm | 60 nights, exchange only | 5 years |
| IKEA ÖNNELAND | €349–€549 (IE) | Pocket sprung hybrid | Medium / Firm | 365 days, full refund | 25 years |
Choose this if…
- You want a traditional firm sprung feel, not a foam mattress.
- You're a back sleeper or solo sleeper of average build.
- You can lie on it in a Harvey Norman before you buy.
- You value heritage / brand familiarity and a sub-€650 price for a Super King.
- You sleep hot and have rejected memory foam in the past.
Consider alternatives if…
- You want a real cash-refund trial — try the Emma Hybrid AirGrid (200 nights, full refund).
- You're a couple sensitive to partner movement — pocket-sprung is mechanically better.
- You're a light-build side sleeper — try a softer pocket-sprung pillow-top.
- You need adjustable-base compatibility — go all-foam.
- You want a longer warranty — IKEA ÖNNELAND offers 25 years at a similar price.
Frequently Asked Questions
The 17 questions Irish buyers most commonly ask before buying this mattress, answered honestly from our 6 months of testing.
Methodology & Transparency
How we tested
We bought the Silentnight Geltex Miracoil Double from Oxendales.ie at full retail price (€547.50, plus €30 paid old-mattress disposal). The mattress was used as the primary mattress in our spare bedroom in Drumcondra, Dublin, for 6 months. Three of our team members (Aoife, Ciarán, Oisín) took it home for individual two-week tests; Siobhán and her partner used it for a 6-night couples test. Pressure mapping was conducted at day 30 and day 90 using a calibrated 2,048-sensor mat. Firmness was measured with a digital firmness gauge under a 75 kg calibrated load. Height, body impression depth, and edge sinkage were measured with calipers and a depth gauge at the milestones described above.
Affiliate disclosure
Mattress Reviews Ireland uses affiliate links. If you click through to Oxendales from this page and buy a mattress, we may earn a small commission at no additional cost to you. This commission does not influence our editorial assessment — we publish the same trial-policy warning whether or not Silentnight is an affiliate partner. See our full affiliate disclosure.
Methodology
We follow the protocol on our how we test page: 90+ nights of sleep across our 5-person team, instrumented measurements, owner-survey integration, and update windows at 1, 3, 6 and 12 months.
Sources cited on this page
- Silentnight: Geltex Miracoil product page · Guarantees & sleep trial · Mattress support systems guide
- Trustpilot: shop.silentnight.co.uk · silentnight-bedding.co.uk
- Slumbersearch UK — Silentnight customer reviews
- Mattress Online — Silentnight Geltex / UltraGel page
- Irish retailers: Oxendales.ie · Harvey Norman Ireland
Last updated: April 2026.