"What Our Gearhead® Experts Are Saying: ""This base layer is seriously impressive—it moves with me like a second skin and keeps me perfectly balanced between warm and cool, even during long ski tours. The Intraknit ventilation zones make a noticeable difference on climbs, and the fit feels totally dialed in thanks to that 3D mapping. It’s the kind of layer that makes you forget you’re wearing it."" The Smartwool Intraknit All-Season Merino Base Layer Crew delivers technical precision and natural comfort in one sleek, seamless design. Built with Smartwool’s Intraknit™ technology, it integrates ventilation, insulation, and articulation directly into the knit, eliminating bulk while enhancing freedom of movement. The merino sport yarns blend breathable, odor-resistant wool with durable synthetic fibers for quick-drying performance that excels during high-output pursuits. Strategically mapped mesh zones optimize airflow to regulate temperature and moisture when intensity ramps up. Whether we’re skinning uphill, snowshoeing, or running in the cold, this lightweight base layer keeps us comfortable, dry, and unrestricted through every motion."

Key Specifications