The Nike Free 5.0 V4 running shoe emphasizes natural foot movement while delivering an extraordinary feel, combined with the cushioning, traction and underfoot protection of a shoe. Updates to this version of the Free 5.0 make it even better for runners who want to reap the benefits of barefoot training. A new tongue design reduces pressure over the top of the foot while adding support by wrapping up around the medial arch. Soft, microfiber synthetic overlays are bonded wherever possible to minimize stitching and maximize comfort. Overlays balance the fit, durability and support of a shoe with the dynamic flexibility of the foot. Molded sockliner mimics the natural curve of the foot for a great fit, comfort and support. Soft foam inserts under the forefoot and heel for added cushioning Phylite midsole for durability, a resilient ride and reduced overall weight. Deep Nike Free sipes for enhanced flexibility and stability. Wider sipes across the forefoot for muscle activation and a more barefoot-like experience. Strategic placement of multiple types of rubber and Waffle traction pattern for durability, proprioceptive feedback and a smooth, sure-footed stride from heel-strike to toe-off. Wt. 8.6 oz.