The Brooks F3 sprint spike will have you blazing out of the blocks and down the straightaway. Made for distances up to 400 meters, this is one track spike that will have heads turning. Aerodynamic shroud, zipper closure, internal ghillie support system. 3/4 Pebax® sprint plate, eight well configuration. TPU strike pod, latex crash pad. Includes 6mm spikes and wrench. Wt. 7.3 oz.