FluidFit technology combines stretch mesh and reinforcements for a comfortable, adaptable fit. Heel Clutching System with a heel counter gives support and holds your heel securely in the shoe. Discrete eyelets disburse lace tension, taking pressure off your feet. ComfortDry X-40 sockliner gives a comfortable fit and adds anti-microbial properties. GEL cushioning in the heel and forefoot provide shock absorption and cushioning for comfort mile after mile. Guidance Trusstic System integrates Guidance Line and Guidance Line Vertical flex grooves for flexibility and a smooth gait. FluidRide allows bounce back and cushioning. Solid rubber outsole provides traction and durability. Wt. 8.8 oz.