NIKE Shox NZ SI Men's Running Shoes Synthetic upper for support Original Nike Shox four-column cushioning unit in the heel provides energy return and total comfort. Phylon forefoot delivers optimal cushioning and a responsive ride One-piece construction and a fitted upper frame linked with a gilly lacing system wraps the foot to the midsole Full-length BRS 1000 carbon rubber outsole with modified circular waffle outsole offers better traction