Innerspring
Innerspring mattresses have wire coils as the support structure. An innerspring mattress has a strong border wire attached to the perimeter of the coils. The border wire supports the coils, helping to retain shape and reduce sagging. The edge is reinforced with specially shaped springs or foam to support the sleep surface right to the edge, to help prevent ‘rollout’ and 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.
Memory Foam Mattress
The Swedish Mattress company, Tempur-Pedic, introduced this material in a mattress form to the people of Sweden in 1991. In 1992, Tempur-Pedic launched the products in North America. With the success of Tempur-Pedic, other foam manufacturers developed their own viscoelastic memory foam materials flooding the market with a variety of options and price levels. With this we also saw the use of vis
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