This minimalist-style crew is anything but insignificant. The Men's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-moveable top, made for all of your most extreme cold-weather activities. With Merino wool yarns and gender-specific ventilation perfectly placed to maximize thermoregulation and breathability during high-intensity activities, it helps amplify moisture management, movement, and comfort. When you're in our best base layers, you're ready for anything.53% Merino Wool, 44% Polyester, 3% Elastane Slim fit is intended to follow the contours of the body Featuring Intraknit™ technology: Insulation, articulation, and ventilation are seamlessly integrated to amplify movement and comfort during high-intensity activities Merino Sport yarn combines the power of Merino with the durability and fast dry times of polyester Seamlessly knit mesh ventilation designed to keep you dry and comfortable 3D mapping provides maximum mobility while ribbed elbows provide added durability Men's Smartwool Intraknit Thermal Merino Base Layer Crew