Flawless feel. Effortless support. Built using softer cushioning and a pillowy sockliner, its got more foam, less weight. New HOLLOW-TECH. New midsole geometry is shaped for a super smooth ride. More underfoot contouring. With an extra layer of comfort closer to your foot with a PWRRUN cushioned sockliner. FORMFIT design addresses every point of contact with your foot, going well beyond lacing to ensure a personalized fit and feel, top to bottom. Lightweight, breathable mesh with minimized layers for a sleek fit. Increased durability with more rubber where you need it. APMA Certified.