14 best mattress toppers 2025, tested for more than 1,000 hours of sleep
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We tested this during a week when it felt like the world (or at least Surrey, where testing took place) was on fire – an unbearably hot week during which we’d ditched our duvet, and were keen to minimise any heat retention. With that in mind, we can honestly say this brilliant topper saved the day.
It kept us wonderfully cool (the blurb credits this to climate control technology, but we suspect the heavy use of cotton had a role, too) and provided just the right amount of support. It was also a brilliant fit – all of the toppers we tried were double or king sized, but our testing revealed huge inconsistencies with sizing, so, we were pleased to discover this wasn’t the case with M&S’s topper.
Yes, this topper really does cost just £32. It’s probably not the best option if you’re looking for a topper to breathe new life into a mattress that should have been discarded years ago, but it does exactly what it says on the tin – providing a decent level of support and cushioning with a hollowfibre filling that won’t turn you into a human hot water bottle. Bonus points for the ultra-sturdy mattress straps, too.
Having overdone it in the gym, we’ve found ourselves suffering from various aches and pains, which were worsened by sleeping on our old mattress. Once this topper had been added, however, the discomfort disappeared. We’re assuming this is due to what Panda refers to as the hydro-foam core, but whatever term marketing decided to use, we love it.
It supported our hips and lower legs in all the right places, and provided just the right amount of support for our head and neck, too. On a particularly humid night, it also did a great job of keeping us cool. There’s a staggering range of sizes – nine in total – and additional shout-outs go to the sustainable bamboo cover and the anti-slip straps in each corner, which ensure the topper stays put.
