Introducing Simba’s Hybrid 1500 Pocket Kids Bunk Mattress! Innovatively designed with five layers to bring you extreme comfort, it features 1500 Conicoil® springs as well as an Aerocoil® spring layer so you receive maximised support and comfort. With Simba’s own open cell graphite-infused Simba-Pure® foam, your child can enjoy a peaceful night’s sleep without overheating. This layer has over thirty times the airflow of regular memory foam so this mattress is a lot fresher. Made with a super soft knitted fabric and added elastance to increase the stretch and comfort of the cover. The fabrics are 100% chemical-free and hypoallergenic.