NIKE Free 5.0 (GS) Boys' Running Shoes 725104-403 Synthetic Woven mesh upper provides lightweight ventilation to help your feet stay cool Molded sockliner mimics your foot's shape for added support Waffle outsole pistons absorb impact and add responsiveness Extra rubber on the heel and at the toe adds traction and durability Hexagonal flex grooves in the outsole create different flex points that allow your foot to move mor