Nike Dri Fit Fly Unisex Cap This breathable cap features sweat-wicking technology to help keep you cool and dry during your workouts. From the gym, to the trail, to the course—this Nike Fly cap is ready for it all. The 5-panel low-depth design features stretchy, sweat-wicking fabric that will keep you fresh through every move. Its unstructured crown and curved bill are made for immediate comfort so you can focus on tackling your goals ahead.