Right on time for the deep freeze, SmartWool’s all-new Intraknit line of Merino wool base layers are ready for action in the arctic outdoors. The Intraknit line is marked by fewer seams, an articulated performance fit, and body-mapped ventilation to cut down on bulk while allowing for effortless freedom of movement. They’re breathable, flexible, and the perfect natural insulator in variable conditions and high-intensity activities.