THE COOL REVOLUTION (8cms) MATTRESS TOPPER is designed with customisable comfort levels on each side of the topper, so you never have to compromise on comfort again. You prefer a softer feel, but your partner wants a firmer surface? No problem, simply unzip the luxurious cover to reveal the two personal toppers cores inside, both with a softer and firmer side. Comes with extra wide, adjustable, elasticated straps to hold your topper firmly in place all night long. The cover is ultra cool too, perfect for anyone who sleeps hot.