The Sleep Safe Evolution Pack?s firm mattress core in cold foam offers extra support for your baby?s back. Thanks to the durable mattress cover, the mattress will last longer too. This Sleep Safe Pack has a firm mattress and a unique mattress protector that ensures your baby can breathe freely in a healthy and safe sleep environment. The firm structure of the cold foam mattress ensures perfect back support. The zip-off cover is machine washable at 60°C! The Baby Protect mattress protector is removable and is developed to ensure your baby can breathe at all times, also when it turns and lies on its tummy. Read more… How? Thanks to the special complex 3D honeycomb structure, your baby lies on a layer of air, which also regulates its temperature and protects it against overheating. The absorption layer immediately retains any spills from nappies or spit. Thanks to the impermeable film, the mattress stays completely clean. Your baby will stay dry, because the 3D honeycomb structure immediately drains any moisture. The mattress protector is also machine washable at 60°C.