The perfect pairing of comfort and flex, the Nike Free RN Distance combines the soft cushioning of Lunar foam with traditional Nike Free flexibility for a natural run that can go the distance. Single-layer circular-knit upper for a lightweight, comfortable fit. Unique midsole features a Lunar core inside a firmer Phylon foam carrier for soft cushioning that remains flexible. Nike Free outsole construction allows a natural range of motion from heelstrike to toe-off. Minimal rubber outsole pods provide durable traction where you need it most.