If you are in safety shoes industry, you know what EVA is. EVA is a very common and traditional element used on safety shoes.  It is mainly used on shoes of lower end and middle quality, high end shoes do not use EVA. The most common EVA color you see is grey. There are mainly two portions on shoes to use EVA, one is beneath front vamp area and the other one is insole. When it is used for insole, it is usually combined with a layer of textile to make a good look and to improve comfort. EVA insole is sometimes attached with another piece of EVA on heel to increase shock absorption. See the following pictures about where EVA is used on shoes.

EVA Insole
EVA Lining

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