Pocket Spring System - A spring system is used to provide support, alongside a bouncy comfort, which materials such as memory foam cannot do alone. In pocket spring mattresses, each spring is individually wrapped allowing them to react independently from one another, increasing body support and weight distribution, in turn reducing the risk of aches and pains in the key areas of the body. 14cm Depth. The perfect replacement mattress for bunk beds, mid sleepers, and cabin beds. The materials used to manufacture the mattress are hypoallergenic and sanitised. Also has anti dust mite features. Great for allergy and asthma sufferers. Complete with a tape edge cover for extra comfort and mattress support. Made to British Standards/Regulations. Arrives vacuum packed and rolled - Rest Relax Little Champ Pocket Spring Mattress - For Bunk Beds, Cabin Beds & Mid Sleepers in White - Size: Single