Men's Nike Free RN Flyknit Running Shoe - KNIT-IN SUPPORT. ADAPTIVE RIDE. Men's Nike Free RN Flyknit Running Shoe brings you miles of comfort with Flyknit constructed upper in a classic silhouette and a newly designed tri-star outsole pattern that adjusts to your foot's every step, delivering support and flexibility. Strong, lightweight Flyknit upper construction provides a sock-like fit. Low-profile cushioning and rounded heel encourage natural footstrike. Auxetic tri-star outsole pattern expands with your step for flexible cushioning. Flywire cables integrate with the laces for a dynamic midfoot fit. Notch in the collar allows for easy on and off. Asymmetrical lacing follows the natural lines of the foot to help reduce lace pressure.