Shred your 100 to 400 meter PR with this aggressive track spike. The Brooks PR Sprint 11.38 has a simplified upper for more aerodynamic performance and a closer, lighter fit. The forefoot is on features a dynamic strap that delivers great support in the power position. Asymmetric saddle construction keeps your foot on the platform so yo can focus on making every step count. Pebax® seven-spike plate, latex heel pad, and ultra-thin sharkskin outsole. Includes 6mm spikes with wrench. Wt. 3.9 oz.