Developed for road races from the 5k to the marathon, the Nike Zoom Streak 5 is for a serious runner looking for a performance shoe that delivers a lightweight, responsive ride. It's designed and tested by some of the best marathoners in the world, so you can be sure this shoe is reinforced for elite status. Dynamic Flywire cables for a durable, customized fit. Seamless vamp for comfort and midfoot lockdown. Full-length Cushlon LT foam for support and cushioning. Heel Nike Zoom unit for response and cushioning. Extremely light forefoot Duralon rubber for added protection at toe-off. Carbon rubber heel for extra durability. Wt. 5.4 oz.