Nike Men's Free 5.0 Cool Blue/Black/Wolf Grey Running Shoe 11.5 Men US mesh New hexagonal flex grooves let your foot move more naturally. Flywire-reinforced Knit mesh upper provides great ventilation and supportive fit. Anatomically shaped heel promotes a more natural footstrike. Nike Free Phylite midsole doubles as an outsole for lightweight cushioning, durability and reduced weight. No-sew overlays throughout provide support and durability without added weight.