The Zoom Maxcat 3 is Nike^s lightest sprint spike. Designed for the serious sprinter who craves the ultimate in lightweight and flexibility. Lightweight, seamless synthetic over mesh upper provides a secure fit while maintaining breathability. Lightweight Phylon? midsole with a carbon fiber midfoot shank. Five-pin spike configuration and a unique Pebax? three-fingered plate offers increased traction without the extra weight. Comes with 7mm christmas tree spikes and a wrench. Wt. 6.0 oz.