Maximum impact protection. Unique responsive perception. Boing. Nike Shox is the result of 12 years of design and research. The Nike SHOX system lessens the risk of impact injuries by reducing the rate of loading. Nike Shox supplies more uniform pressure distribution for enhanced comfort. This is the future of high performance, cutting edge, innovative running footwear. The Shox is engineered to propel the game's best to the highest level of explosiveness and quickness. The upper features molded synthetic leather with internalized medial side anti-inversion stability structure, the midsole is lightweight Phylon, exposed heel Air-Sole unit with forefoot articulated Zoom Air unit and the outsole is solid rubber with maximum traction herringbone design.