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Zappos.com is proud to offer the Brooks - Twitch S (Carolina Blue/Pearlized White/Silver/Black) - Footwear: This versatile sprint spike is designed for the racer seeking a lightweight shoe for distances up to 400 meters and features 6mm pyramid spikes and wrench. ; Nylon spike plate – new lightweight rigid sprint plate with seven spike receptacles for excellent traction and power at toe-off. ; Latex crash pad in the heel provides lightweight cushioning from impact. ; Ultra-thin carbon rubber outsole – to maintain durability and traction control without the added weight of normal rubber. ; Internal support saddle – internal arch wrap provides added upper support through the midfoot for a glove-like fit. ; 5.60 oz.