Feeling light on your feet when you're running is, in part, made possible by the Icebreaker Men's Strike Lite Short. Its exterior fabric is light, breathable and completely recycled, and the liner's Cool-Lite fabric effectively manages moisture, breathes, and provides the stretchy performance necessary for running quickly and comfortably. Made mostly of ultralight merino wool, Cool-lite fabric also excels at thermal regulation and odor-resistance.