The Nike Phenom Men's Running Trousers are comfortable before, during & after your run. They have a soft feel & a tapered design so you can layer them over shorts or wear them on their own. Comfortable Performance The loose fit in the thigh gives you a modest, less exposed feeling than tights, yet below the knee they taper so the cuffs don't flap as you run. Sweat Wicking Dri-FIT Technology helps keep you dry & comfortable by pulling sweat away from your skin to the fabric's surface where it quickly evaporates. Quick Changes Zips at the ankles let you take the trousers off over your shoes. There is a mesh gusset behind the zip so you can wear them unzipped to let your legs cool down post-run.