A plush, cushioned running experience, mile after mile. ISOFIT upper creates a dynamic fit that adapts to the shape and motion of your foot. Open toe box design for comfort. Lightweight Support Frame for structural integrity. Reflective synthetic on the collar for visibility in low light. PWRGRID+ midsole platform for enhanced impact protection and improved durability. SRC Impact Zone for durable shock absorption at impact. XT-900 carbon rubber outsole for traction and high-wear properties. Wt. 10.3 oz.