With the right amount of warmth and stretch, this Columbia Heavyweight Top is the perfect base layer for any kit. Omni-Wick fabric Moisture-wicking fabric moves perspiration away from the skin to dry quickly on the surface. Four-way stretch for improved range of motion. Omni-Heat reflective lining Metallic lining reflects body-generated heat for improved warmth retention. Backing dissipates excess heat. Membrane comprises sixty-five percent of lining for high breathability. Comfortable crew collar. Raglan long sleeves provide a wide, natural range of motion. Flat-locked seams help reduce chaffing for all day comfort. Branding on the left chest and cuff. 85% polyester, 15% elastane. Machine wash, tumble dry.