The 361 Sensation is a performance shoe that has been specially crafted to fit your athletic needs. It combines ultimate balance of cushioning, stability and comfort making this style perfect for high mileage runners. The specialized QDD (Quick Dynamic Defense)/QDP (Quick Dynamic Performance) systems are lightweight and responsive. Working to provide superior shock dispersion, guidance, and energy return upon each stride's impact with the ground. Upper: Direct attach upper with air mesh for improved comfort and fit. Midsole: Multi-density proprietary delivering enhanced shock attenuation, guidance and acceleration. Outsole: High abrasion rubber in heel strike zone, blown rubber in forefoot for better shock dispersion and traction.