The Nike Shox Resistance TR L cross-training shoe is made for the athlete who trains for her sport and is looking for fit, comfort, cushioning and stability. Leather upper with leather overlays for added support. Five-column Nike Shox™ unit provides cushioning in the heel. Double-lasted forefoot helps improve stability. Non-marking rubber outsole with lateral outrigger adds lateral stability. Exposed forefoot flex grooves help improve flexibility.