Reebok Men's Realflex Transition Training Shoe 100% Synthetic Synthetic sole Mesh upper - gives support, comfort and breathability to the runner. This shoe offers the ultimate in softness, pliability, durability and all round performance. RealFlex sole design - This contains 76 individual sensors that allow for multi-directional flexibility through the entire footstrike, from landing to takeing off. Low-profile, minimalist silhouette - for low-to-ground feel and added mobility; form-fitting design and sock-like feel keeps shoe in contact with your foot at all times. 3D Ultralite outsole - provides lightweight support for the foot while encouraging natural footstrike. PU sockliner - for added cushioning and support.