This high-performance base layer was made to keep you warm during intense cold-weather activities. Work up a sweat—the wool-blend fabric is wicking on the inside and insulating on the outside, so you feel warm and comfortable even when wet. wool-blend Wool-blend fabric dries quickly and helps regulate temperature. Dries quickly features Designed for: Training Insulation and breathability: Using SenseKnit™ technology, varying levels of insulation and breathability are knit seamlessly into the fabric to give you warmth and ventilation only where you want it Tight fit: Tight fit helps wick away sweat