ASICS Men's GEL Hyper Speed 7 Running Shoe 100% Synthetic Imported Rubber sole Seamless construction the use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams Perforated sockliner optimizes moisture drainage and improves breathability Dura sponge outsole a blown ahar rubber compound for enhanced cushioning and durability in the forefoot Magic sole vented midsole and outsole minimizes weight and maximizes breathability Magic Sole Vented midsole and outsole minimizes weight and maximizes breathability