Nike Zoom X Streakfly Mens Running Shoes Nike Zoom X Streakfly Mens Running Shoes is one of the lightest produced by Nike, aimed at allowing you to take on the competition in 5 and 10K races with a full length Zoom X midsole providing the ultimate in lightweight responsiveness with an ultra-thin knit upper that's super sleek with additional reinforcement in the forefoot for a locked down, secure fit.