Lightweight, responsive DNA FLASH cushioning puts explosive power under every step in a built-for-speed running shoe with a built-for-performance fit. The nitrogen-infused sole adapts to your stride to propel you comfortably forward and helps you recover quickly so you can tackle more miles more often. Energy return: transforms every heel strike into responsive, explosive forward movement Speed: transforms impact absorption into propulsive energy with ultra-lightweight cushioning Lightweight: puts cushioning and performance underfoot with an emphasis on streamlined comfort Removable cushioned insole allows for custom orthotics DNA FLASH nitrogen-infused midsole fuses explosive energy return with a lightweight, adaptable fit Synthetic and textile upper and lining/synthetic sole Imported