Awful mattress, made my son sweat profusely. It was supposed to be what he’d had already. We swapped out their mattress protector as it was plastic backed not cotton- wouldn’t have bought it if I’d realised this. I bought a tog 4 duvet. He’s a normal weight 11 year old and with a much lighter duvet on the same set up (slatted bed) not in a heat wave, he was sweating profusely. He’s fine in my bed (memory foam) or his old bed (pocket sprung with memory foam topper) but not on this mattress even with all the adjustments. I contacted the company within 2 weeks of having purchased it and they refused to refund it claiming it’s not faulty, despite not having looked at it. They offered me £20 discount on a new one. Terrible customer services and complete breach of consumer legislation. Will be taking the matter up with my credit card for them to resolve as the company say they won’t enter into any further discussion about it other than to sell me another mattress with a £20 discount!!!