Nike Flex RN 2019 Men's Running Shoe STRETCH INTO YOUR STRIDE. The stretchable knit upper of the Nike Flex RN 2019 wraps you in softness as it expands and contracts along with your foot. Dual-density foam layers supply durable cushioned comfort, while grooves on the outsole give you heel-to-toe flexibility.
Multi-directional stretch knit expands and contracts with your foot. Dual-density foam cushions every step. Flex grooves on outsole move and bend for heel-to-toe flexibility. Synthetic overlays around the laces provide structure for a secure fit. Heel strap stabilizes the back of your foot while allowing natural movement. Heel and tongue loops stretch the opening so your foot easily slides in.
