Nike on Twitter: "This summer, it's personal. The Nike Zoom Superfly Flyknit designed for Allyson Felix: https://t.co/zDhFLvTtdJ https://t.co/Wm4pNHGzs8" / Twitter
7 Tips for Track and Field Spikes
Nike used 3D printing and Olympic sprinters to design its new track shoe | Engadget
Nike unveils shoes for 100-metre sprinter at Rio 2016 Olympics