Shred your 100 to 400 meter PR with this aggressive track spike.Simplified upper for more aerodynamic performance and a closer, lighter fit. The forefoot 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 1/4" pyramid spikes and a wrench. Wt. 4.4 oz.