The Nike Shox NZ SI puts comfort into play with super cushioning and a dynamic fit. A simple, one piece innersleeve upper offers a dynamic fit while the perforated synthetic frame locks the foot to the midsole for enhanced stability. The Phylon forefoot ensures a responsive ride and the original Nike Shox four-column cushioning unit in the heel offers excellent cushioning. A full-length BRS 1000 carbon rubber and Waffle Fill outsole ensures super stop-and-go traction