Oisín

Oisín is the team's heaviest tester at 95 kg and a dedicated stomach sleeper — a combination that puts mattresses under serious stress. If a mattress allows too much hip sinkage, Oisín will find it. If the foam breaks down after a few months under heavier weight, his long-term testing catches it.

As a hot sleeper who regularly kicks off the duvet by 2 AM, Oisín is also the team's toughest critic on cooling performance. When he reports sleeping through a warm night without overheating, that's a meaningful endorsement of a mattress's temperature regulation.

His honest, no-nonsense feedback has led to some of our most direct warnings about mattresses that aren't built for heavier or stomach sleepers — the kind of candid advice that saves readers from expensive mistakes.