The Finer Details The more flexibility that you have in the midsole and outsole, the more you can move naturally. We shaped the Zoom Air unit like a horseshoe for added flexibility while the traction pattern on the outsole helps you get after whatever's on your workout agenda. The more supportive the shoe, the more stability it can give to your stance. A combination of tuned support and intentionally placed cushioning helps you feel secure with every step. The tough, molded wrap around the shoe helps keep your heel supported and secure. The low height of the Zoom Air unit helps keep you closer to the ground while its flex groove helps reinforce and strengthen lateral stability. The more cushioning that you have underfoot, the more comfortable your workout can be. Cushioning helps soften impact as your feet hit the ground. The Zoom Air unit gives you plenty of responsive snap and pop when it’s time to move. It combines with a foam midsole to give you cushioning for your workout. Chenille fabric in the upper is blanket-soft to the touch, yet it’s breathable and reliable when you’re in the last part of an intense workout. Nike Womens Versair