ScentLok Men's Black Climafleece BaseSlayer Long Sleeve Shirt- A smooth, lightweight outer fabric is great for layering when the temps drop, while the micro fleece lining offers enough warmth that you could wear it alone on warmer days. Carbon Alloy technology Silver Alloy technology Fusix technology Wicking technology Smooth polyester outer fabric Micro fleece inner lining Rear stretch panels Flat, narrow collar Flat-lock seams Style: 1012313