Engineered with lightweight fabric that traps body heat, the Base 3.0 Crew provides superior bulk free warmth in even the coldest conditions. Featuring 4 way stretch materials and moisture managing properties, this shirt is built to provide the comfort you need on your next adventure. Polyesterelastane blend. Moisture Transport System wicks sweat and dries quickly. Anti odor technology. 4 way stretch fabrication for optimal range of motion. Soft, brushed negative grid interior retains body heat. Long sleeves. Crew neckline. Imported.