ColdPruf Men's Performance Single Layer Bottom 96% CPT Performance Polyester / 4% Spandex Imported Single layer, jersey knit fabric with a close moves-with-you athletic fit. Best used as a base layer in cold to very cold weather and medium to high activity Pant sits at natural waistline. Front and back rise provides an exceptionally comfortable fit and maintains coverage during various activities Tagless labeling, non-itch waistband and gussets for added durability and comfortable fit Convenient functioning front fly Moisture management wicks perspiration and dries quickly Featuring ColdPruf Technical Fiber formulated with Silvadur Intelligent Freshness to minimize odor and odor causing bacteria on fabric