Seamless upper construction eliminates distractions so you can focus on your race. Elastic laces for fast and easy on and off. Perforated sockliner allows moisture drainage. Rearfoot GEL Cushioning System absorbs shock at heelstrike and creates a smooth transition. Guidance Line Midsole Trechnology encourages a more natural running stride. ASICS High Abrasion Rubber in high-wear areas of the outsole for durability where you need it most. Drainage ports speed up drying. Wt. 6.7 oz.