With floral patterns and even more functionality, the Smartwool Intraknit Thermal Merino Crew 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 us to 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.