Nike Flex Run 2018
Circular-knit upper for strategic stretch and support. Dynamic Flywire cables for a locked-down fit. Minimal heel design made with foam secures the back of the foot while allowing natural movement. Traditional tongue construction cushions lace pressure. Molded EVA sockliner for comfort and support underfoot. Co-molded midsole uses a softer injected unit (IU) core foam directly underfoot and a slightly firmer injected unit (IU) carrier foam for softness and support.; Tri-star pattern for flexibility; hot knife cuts throughout for flexibility.; Rubber in high-wear zones for added traction and durability.; Heel is rounded for a smooth transition at initial touch down.