Smartwool W Intraknit Thermal Merino Base Layer Pattern CrewWith floral patterns and even more functionality, the W Intraknit Thermal Merino Base Layer Pattern 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