The Nike Free 3.0 v5 running shoe is super minimal and highly technical. It's the next best thing to barefoot. Engineered Mesh flexes with the foot while providing support in the upper. Dynamic Flywire supports the midfoot for an adaptive fit. Inner bootie hugs your foot for a snug, secure fit. Flex groove design enhances natural range of motion. BRS 1000™ carbon rubber and environmentally preferred rubber inserts enhance durability at high-wear zones. 4mm offset delivers the most barefoot-like feel. Wt. 5.8 oz.