Inspired by the dedication and demands of today's runners, the Nike Shox NZ Women's Shoe delivers the ultimate in high-tech style and plush comfort. One-piece upper with gilly lacing system for superior fit and stability. Phylon forefoot midsole for a lightweight feel . Four-column Nike Shox unit in the heel for optimal cushioning. Full-length rubber outsole for supreme traction. A revolution in cushioning and impact protection. Nike Shox technology provides an optimal environment for cushioning, a slower rate of impact loading (which helps reduce the risk of impact-related injuries) and a uniquely responsive feel. The highly resilient foam in Nike Shox columns is made of energy-efficient material that enhances durability and spring.