Cover ground quickly. The Performance Trail looks different for a reason. The high cuff serves as a built-in scree-guard that helps keep out trail debris while trail running, mountain biking, or moving fast. Below the cuff is a balanced base layer with a lightweight profile, strategically-placed LIGHT cushioning zones, and the 'custom-fit-feel' of our patented 'Y-Line' knitting structures. Air vents increase breathability during highly aerobic activities.