When the mercury drops and your adventure cranks up the intensity, the Smartwool Intraknit Thermal Merino Base Layer Crew delivers next-level performance engineered specifically for men's cold weather activities. This isn't your average thermal underwear – Smartwool's revolutionary Intraknit technology seamlessly weaves insulation, ventilation, and articulation zones into one incredibly lightweight yet warm base layer that moves like a second skin. Strategic ventilation zones are placed exactly where men generate the most heat during high-intensity winter sports, while the merino wool blend naturally regulates temperature and fights odor even when you're pushing limits on the mountain or trail. The 3D body mapping creates an almost custom fit that hugs your contours without restricting movement, so whether you're skinning up backcountry slopes, ice climbing, or just need serious thermal protection for extreme cold weather, this crew neck base layer keeps you comfortable and focused on the adventure ahead.
