Smartwool Intraknit Thermal Merino Base Layer Crew

This thermal merino crew may look simple, but its technology is anything but that. The lightweight, super-moveable top, is made for all of your most extreme cold-weather activities. With Merino wool and Intraknit ventilation placed to maximize regulation and breathability, it helps with moisture management, movement, and comfort. When your base layers are working, you're ready for anything.