Designed for the sprinter who craves flexibility blended with support (100-400 meter events). Developed with the greatest sprinters of all time. More nimble in the turn, yet powerful down the straight. Aerodynamic, form fitting, and laceless one-piece shroud upper with internal bootie and added support strap for enhanced support and forefoot lockdown. Compression-molded Phylon™ midsole wedge. Flexible Pebax® plate and articulated forefoot for correct foot control on the turn, five removable spikes provide traction in key traction zones under the foot. Weight 6.0 oz.