Seamless upper for a comfortable, distraction-free fit. Elastic laces and strategically placed tongue hole for quick, easy on and off. Perforated sockliner and drainage ports keep feet feeling dry and fresh. Rearfoot GEL Cushioning System absorbs and disperses shock with every step. 6mm offset. ASICS High Abrasion Rubber in high-wear areas of the outsole adds durability where you need it most. DuraSponge rubber for cushioning and flex. Wt. 5.6 oz.