Ecco-s Circle Spring shoe combines style with function. The leather lining and removable leather covered insole keep the shoe breathable while offering a level of unrivalled comfort. The soft leather upper is light flexible and highly breathable.. Leather lining is moisture absorbent and breathable. Insole is moisture absorbent breathable and has unsurpassed shock absorption. Flexible PU sole provides shock absorbency for all day comfort. http://www.clothesandshopping.co.uk/uk/fashion/shopping/clothing/044/spring/product.html