Really practical drawsheet... one side per season! Recommended to avoid staining the mattress! This fitted protector is available in 6 sizes. Mattress protector with dust mite protection & reversible winter/summer sides:" Summer" side in loop pile towelling, 75% cotton, 25% polyester (140 g/m²)." Winter" side in pure cotton fleece (150 g/m²). Flexible polyurethane membrane between the 2 sides ensures waterproofing. Pure cotton jersey flap & band & elasticated corners for a secure fit.WHAT YOU NEED TO KNOW: Easy care: can be hot-washed for deep down hygiene & is also suitable for tumble drying. Please note: this is a green star item, extra discounts will not apply.