Single layer, brushed inside. Moisture management wicks and evaporates moisture. Versatile and great for base layer, casual wear or active wear. Flat seams, tagless and hemmed cuffs. Cold to very cold weather. 85% ColdPruf Technical Fiber with Silvadur™ Intelligent freshness & 15% spandex. Crew has a drop-tail, pant has front and back rise, gussets and comfort waistband.