Breathable upper with smooth seams for a comfortable, second-skin feel. External heel counter keeps the foot locked in place for a secure fit. Molded Micro G footbed molds to the foot for customized cushioning. Two-piece Charged Cushioning places dense foam under the heel and softer foam in the forefoot for responsive cushioning. Outsole flex grooves help create a smooth, natural running stride. High-abrasion rubber in high-wear areas of the outsole for durable traction on any surface. Wt. 9.8 oz.