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The characteristics of foam: insocks

Investigating the use of foam insocks and how such components can be assessed with regard to their fitness for purpose.

Polymer foam is a versatile material with a variety of applications in footwear – from padding in the topline and tongue to underfoot cushioning in the form of insocks and midsoles. Essentially, such foams are materials which trap pockets of gas within their structure. These are commonly known as ‘cellular’ materials and they are generally a good choice due to their soft nature. Foams are used in low-cost footwear through to high-end specialist shoes, where the foam is designed to enhance performance.



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