NIKE Boy's Air Max Dynasty 2 Running Shoe Anthracite/Metallic Cool Grey-Black Synthetic Imported Flywire technology throughout upper adds support and a lock-down fit Max Air unit in the heel is light, flexible and delivers supreme cushioning Soft phylon midsole absorbs shock for protection and adds springy responsiveness Durable rubber outsole for traction and grip Strategic flex grooves mimics natural range of motion for consistent strides