Looking for Answers about Nike Zoom Streak 4 - Men's?

The Nike Zoom Streak 4 racing flat is made for road races from 5K to the marathon. Ultra-lightweight mesh upper with a seamless midfoot saddle provides an exceptional fit. Full-length Cushlon LT midsole adds great support and cushioning. Heel Nike Zoom™ unit offersadded protection. Extra thick, super light forefoot Duralon rubber delivers added protection at toe-off. Carbon rubber heel gives durability. Wt. 7.2 oz.