Nike’s EXP-X14 features a translucent yellow and orange upper that’s inspired by the look of the Zoom Fly and React Element 87. The running-hybrid silhouette’s name stands for Experiment (EXP), while the X14 represents Nike’s in-house code for React cushioning. Team Orange and Persian Violet accents create a vibrant appeal, while Steve Prefontaine’s record mile-time is stenciled into the heel.