Featuring a new sprint spike plate inspired by our elite racing spikes, the SD100v3 provides a dynamic fit and ride for the emerging sprinter. The removable six-spike forefoot configuration offers just enough rigidity, while a molded heel with textured outsole rubber provides traction in the blocks. Product Details 178 grams (6.3 oz) 6 spike configuration Bootie construction Breathable air mesh Innovative REVlite midsole provides premium responsiveness and durability at a 30% lighter weight than other foams with comparable performance No-sew overlays Removable spikes for superior traction Synthetic/mesh upper Unisex sizing.