Flex 2019 Run White/Black

STRETCH IN EACH STEP. The Nike Flex RN 2019 gives your run more stretch. A stretchy, knitted fabric wraps you in softness and expands and contracts in time with your foot. The double density of the foam bearings offers shock-absorbing comfort, while hot-knife-cut grooves in the outsole give you flexibility from heel to toe. The fabric with stretch in 4 directions expands and contracts in step with your foot. The dual-density Solarsoft foam dampens each step. Textured for grip from heel to toe with hot knife sewing. The synthetic covers around the shoelaces offer structure for a secure fit. The heel and tongue loops have stretchy openings so that the foot easily slides in. The flex grooves on the outsole move and bend for the ultimate in flexibility.