Inflatable supports

An inflatable body support comprising an upper inflatable layer and a lower inflatable layer, the upper layer comprising upper and lower surfaces sealed together providing a plurality of separate air passages which are independently inflatable and deflatable and which air passages, taken together, are distributed over the area of the upper layer with each air passage including a series of enlongated tubes, such that the tubes of different air passages are juxtaposed, the upper surfaces of the tubes being convexly curved, taken transverse to the direction of elongation, to present a series of generally parallel curved surfaces which support the body located thereon, said lower inflatable layer being located directly beneath the upper layer and being inflatable separately from the upper layer and continuously over substantially the entire area directly beneath the upper layer, such that the lower layer, when inflated, continuously and directly supports substantially the entire area of the upper layer, such that the extent of the said curved surfaces of the tubes which acts to support the person thereon is dependent upon the degree of inflation of the lower inflatable layer, and the upper surface of the upper layer includes means for permitting limited air bleeding therethrough.