The fantastic Kinder Valley Deluxe Pocket Sprung Cotbed Mattress contains a Bonnell Spring Unit encapsulated in superior quality foam interior; providing extra support for your little one, each spring is wrapped in an individual pocket to allow extra movement and comfort. The cover is double sided and made from luxury CoolPlus fabric which is air permeable, water resistant and wipe clean. , , This 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 in the washing machine after any little spillages. It is also breathable, water repellent and anti- allergenic, to protect against dust mites. This mattress helps to dissipate heat from your baby's body for a more comfortable night's sleep.