Details: Fly out of the blocks with these lightweight spikes designed to withstand the impact of sprint events. Woven upper for a breathable, flexible fit. Asymmetrical tongue construction wraps the foot, eliminating irritation. Seamless toe tip for comfortable durability in the blocks. Heel counter sits low on the foot for reduced achilles pressure. Low-profile Phylon midsole wedge cushions on impact and creates a smooth transition from heelstrike to toe-off. Eight-spike Pebax plate has areas of stiffness and flexibility where you need them most. Wt. 6.6 oz.