This raised bed is made of two chambers.the lower chambers serves a spring box on a tradition bed whilst the upper chamber serves as a mattress.the air mattress is made of strong fibre and not rubber which gives it resistance to any heavyweight and is waterproof this air bed has an inner construction which makes it sturdy & not shrink & deform in size when used overtime unlike the normal foam mattress that deform & shrinks in size even used over a long time.another advantage is that,this air bed has pressure specially dispersed according to different parts of the body to relax and keep your spine in autral curve(perfect & recommeded sleeping form for the spine). you get total comfortability & body pain relief after sleep unlike the normal foam mattress that leaves your body in pain after sleep. it has an inbuilt electric pump.