Nike Men's Free RN 2017 Running Shoes in Black/White/Dark Gray Size 12.5 Very Good Used Condition - Slightly dirty but no wear Low-profile cushioning and rounded heel encourage natural footstrike. Auxetic tri-star outsole pattern expands with your step for flexible cushioning. Simplified one-piece upper provides ventilation and support where you need it most. Medial seam has been removed for a seamless fit. Minimal, molded sockliner mimics the curvature of the foot to add support.