Nike Free is designed to help runners run more efficiently and offer the most comfortable barefoot experience, with multi-directional flex grooves enhancing natural flexibility. The engineered mesh upper provides the comfort and fit you'd expect of a traditional shoe, conforming to the shape of your foot to support you as you move. Flywire integrated with the laces delivers added support and an adaptive fit. Available in various models including the Free 5.0, Free 4.0. Free 3.0 and a cross-training TR FIT / BIONIC variants and the Nike Free Flyknit.