... Accessories>>Shoe Parts & Accessories>>Insoles>>Other InsolesA soft, also more freely and easily, petrophysical property, good consideration to tear strength ... , etc.1, EVA (E), VA acetate) : contain more elastic vinyl acetate, the better.2 and natural rubber, synthesis ... impact resistance, durability of requirement of large base shoe more appropriate, But the existence yellowing, hydrolysis, cracked, ...