The Nike Free Trainer 3.0 training shoe features Dynamic Fit that offers a glove-like fit and feel. Mesh innersleeve. Low-profile Phylon™ midsole adds lightweight, responsive cushioning. Sidewall wrap-up design cradles the heel and the midfoot. Delta Nodes traction pattern gives ultimate grip on multiple surfaces. Diamond Flex design aids multidirectional movement. Wt. 9.5 oz.