NIKE Free 4.0 V3 Running Shoes ** UPDATED ** Textured Mesh Full Inner Sleeve - For a dynamic, sock-like fit that hugs the foot, preventing slippage. ** UPDATED ** Larger Seamless Mesh Panels - Unlike the previous version, the seamless upper features large mesh panels on the midfoot that increase airflow for enhanced breathability. ** UPDATED ** Diagonal Cuts - Through the arch to encourage natural motion flexibility and help increase foot strength. Super-Low Profile (6mm Offset) - A low-profile midsole delivers a more barefoot-like feel than the Nike Free 5.0+, with a 6mm offset between heel and forefoot height for a blend of cushioning and flexibility. Advanced Flex Groove Outsole - The flex groove outsole provide advanced flexibilitymade up of deep cuts along the length and width of the midsoleenhances natural range of motion, encourages a smooth, efficient stride and helps maintain stability.