ASICS Women's GT-2140 Running Shoe 100% Synthetic leather and synthetic fiber Rubber sole Solyte midsole material is lighter than ASICS' standard EVA and SpEVA, combined with improved cushioning and durability DuoMax Support System helps ensure that the shoe maintains proper support for the foot during the critical transition from heel strike to toe-off Gender specific Space Trusstic System recognizes the normal periodic changes in the shape of the woman's arch and provides for the controlled deformation of the arch into the space within the system ComforDry sockliner provides optimal cushioning performance in a cooler, drier, healthier environment