ColdPruf Men's Performance Single Layer Long Sleeve Crew Neck Top 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 Drop tail maintains coverage in various activities Self-fabric cuffs with ColdPruf wordmark on sleeve Tagless labeling and flat seems provide a smooth fit and extra comfort 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