The most widely purchased type of bedding, long the standard of the mattress industry, representing over 80% of the market, innerspring mattresses are distinguisched from other types of beds by their use of coil springs of support. Layers of upholstery provide insulation and cuschioning between your body and the springs unit. The result of this basic approach, coupled with state of the art tecnology, is a full range of comfort choices. The border wire supports the coils, helping to retain shape and reduce sagging. The edge is reinforced with specially shaped springs or foam support the sleep surface rigt to the edge breakdown. The upholstery is separated from the innerspring system by an insulator, a tough padding, wire or netting layer that prevents the upholstery from sinking into the coils.