Made to fit cot and junior beds, the Mamas & Papas Sleepsafe Spring Interior mattress offers excellent comfort and support for your child. It features a high tensile coil spring unit, removable, soft quilted, machine washable cover and an adjustable waterproof membrane to protect the mattress. Surrounding the springs is a layer of nursery foam which allows good air movement to moderate your baby's body temperature. The Sleepsafe mattress also has tapered edges for additional support and durability. Conforms with British Safety Standards BS7177:2008 and BS1877pt10:1997.