Prolong the life of your mattress and give yourself a little extra comfort with M&S\' comfortably cool mattress protector. Made with a 100% pure cotton cover and a Dacron® eco polyester filling that’s designed to wick moisture away from your body on hot nights, this fantastic mattress cover provides breathability and cool comfort as you sleep. Machine washable, this clever mattress protector can be laundered with ease, making it a summer bedding must-have.100% cottonFilling- 100% polyesterSuitable for mattresses up to 30cm deep