What Is Eva Material In Shoes

Eva or cm eva foam compression molded eva or ethylene vinyl acetate.

What is eva material in shoes. Eva is a material favored by many shoe manufacturers particularly athletic footwear makers. Nike likes to call theirs pylon but it is the same stuff whatever you call it. It is a plastic made by combining ethylene and vinyl acetate to create rubber like properties which can be used for shoe soles. Used to make running shoes basketball shoes and almost any other sports shoe eva is lightweight resists compression set forms easily and is available in nearly every color.

Eva is what s known as a copolymer a combination of two different plastics and can vary widely in its ratios. Higher quality shoes will have around 40 percent vinyl acetate and 60 percent ethylene the lower the amount of vinyl acetate the more brittle and likely to crumble the midsole will be. That is an elastomeric polymer that produces materials which are rubber like in softness and flexibility. Soft and flexible eva is technically a foam instead of a rubber as it is formed by expanding plastic and trapping pockets of gas air in various densities.

Eva midsoles are the most common cushioning materials in modern sports shoes. A foamed midsole material that offers good cushioning and compression set. Eva stands for ethylene vinyl acetate.