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Insole

Footwear includes dress shoes and casual shoes, running shoes and walking shoes, ski boots, roller skating boots or shoes etc. The statics and dynamics of the foot are influenced by footwear. The selection of material and geometrical design of the sole of a shoe are of particular significance for the sequences of movements during walking. The soles are intended for the relief of the foot, in particular the sole of the foot, by pressure equalisation, as pain in the foot and the sole of the foot is most cases is caused by concentration of pressure. Cushioning insoles of various types are known for use in shoes, particularly for use in running shoes and other shoes intended for athletic activities. Typically, these insoles take the form of a relatively thin layer of foam material which rests atop the sole of the shoe, and are often removable for washing or replacement. Insoles can be an integral part of the piece of footwear as a permanent part of a shoe, or can be a removable portion of a piece of footwear when it is manufactured. Insoles can also be of an after-market product to be inserted into footwear by a consumer, or as replacements for insoles which wear out. Much of the footwear sold today includes replaceable insoles. Replaceable insoles offer the user several benefits which include the ability to replace worn insoles, the ability to select an insole which is specifically designed for the requirements of the user, e.g., running, prolonged standing, fallen arches, etc. Replaceable insoles can be made in individual sizes corresponding to shoe size or made in a limited number of sizes and the insole can be trimmed down to the desired size. Replaceable insoles have been designed to fulfill specific purposes such as shock absorption, and structures intended to facilitate the proper orthopedic placement of the foot, support for fallen arches, etc.

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