Lift. Run. Move. In the Nike Free Flex, you have the freedom to choose your own workout adventure. Its all-purpose attributes unlock a wealth of training options, thanks to a flexible outsole and lightweight upper. Flexibility:very high:The rubber outsole comes with built-in cutouts for flexibility. And there are thin slits in the forefoot for added flexibility.,Cushioning:moderate:A full-length foam midsole offers comfort and cushioning.,Stability:moderate:An elastic band around the heel supplies added support.,Lightweight Support:The upper is made of mesh for lightweight, breathable support. The mesh collar gives you soft comfort around your ankle.