The Smartwool Men's Intraknit Thermal Merino Base Layer Crew Shirt is built for peak performance in extreme cold-weather conditions. Designed with advanced 3D mapping, it delivers a near-custom fit that moves naturally with the body, enhancing mobility and comfort. The Merino wool blend provides natural moisture management, odor resistance, and temperature regulation, keeping you dry and fresh through high-intensity activity. Seamlessly knit mesh ventilation zones are strategically placed for targeted breathability, ensuring you stay warm without overheating. With Intraknit technology that integrates insulation, articulation, and ventilation, this base layer sets a new standard in performance gear.