ASICS Women's Hyper-Rocketgirl XCS Track and Field Shoe 100% Synthetic and mesh Rubber sole Women's Specific Fit is constructed to meet the fit requirements of the woman athlete SpEVA Midsole Material improves bounce back characteristics and decreases midsole breakdown Trusstic System reduces the weight of the sole unit while retaining the structural integrity of the shoe Solid Rubber Outsole provides enhanced durability and traction Spikeless Outsole provide straction on all surfaces