The moo moo comfy mattress is especially created for kids keeping their comfort in mind and has a novelty design 15cm thickness coil spring system double jersey cover zip off cover ideal for bunk beds high sleeper and mid sleeper made in the uk to british regulations traditionally made for a bounce a spring system is used to provide support alongside a bouncy comfort which materials such as memory foam cannot do alone no rolling off around the spring system used in this mattress a reflex foa