The fantastic Kinder Valley Spring Cotbed Mattress contains a Spring Unit encapsulated in a polyester fiber, providing extra support for your little one. The Cot Mattress cover is quilted on one side for extra comfort and made from luxury CoolPlus fabric which is air permeable, water resistant, and wipe clean. This baby mattress features a special net lining to enable ease of the removable, washable cover. The cover comes with a handy zip to allow you to remove it and pop it in the washing machine after any little accidents. It is also breathable, water resistant, and hypoallergenic, to protect against dust mites. This mattress helps to dissipate heat from your baby’s body for a more comfortable night’s sleep.