Nike Free Run + 3 - Men'sThe Nike Free Run+ 3 blends the strengthening and injury-prevention benefits of barefoot running with the comfort and protection of a running shoe. Breathable mesh and multi-layer upper provides a lightweight, second-skin-like fit. Adaptive fit midfoot construction brings customizable comfort. Sculpted Phylite™ midsole/outsole adds lightweight support and cushioning. Deep Nike Free sipes enhance flexibility for a barefoot-like ride. BRS 1000™ carbon rubber heel and environmentally preferred rubber offer durability. Waffle® piston outsole enhances cushioning and response. Removable insole. Wt. 8.6 oz.