Multi-directional stretch mesh for a custom-fit upper. FluidRide midsole offers energy return, cushioning, and reduced weight. ComforDry X-40 sockliner with anti-microbial properties keeps you dry and healthy. Dual-density midsole system for support and comfortable stability. GEL® Cushioning systems for natural movement through the gait cycle. Guidance line on outsole with vertical flex groove for stride efficiency. Wt. 11.5 oz.