ColdPruf Men's Premium Performance Single Layer Long Sleeve Crew Neck Top Single layer engineering with trim athletic fit and extra length in body and sleeves formoves-with-you-comfort Crafted using the highest quality materials including ColdPruf Technical Fiber with Silvadur technology, providing freshness protection to minimize odor and odor causing bacteria on fabric Hemmed cuffs with ColdPruf wordmark on sleeve and elastic thumbhole loop for ease in layering Drop tail maintains coverage in various activities Moisture management system wicks perspiration and dries quickly Best used as a base layer in cold weather or as a lightweight sun protection