The Smartwool Women's Intraknit™ Thermal Merino Pattern Crew Base Layer is engineered to enhance your performance with lighter weights and a cleaner finish. This Smartwool® base layer is 3D-mapped for a near-custom fit and freedom of movement, while ribbed elbows provide extra flex room. New technology allows seamlessly knit mesh ventilation in gender-specific zones designed to help keep your body dry and warm as you zip up and venture out in comfort. The Smartwool Women's Intraknit™ Thermal Merino Pattern Crew Base Layer offers functionality for high-intensity activities.