Smartwool

Intraknit All-Season Merino Base Layer Bottom - Men's

What Our Gearhead® Experts Are Saying:

"I wear the Intraknit All-Season Merino Bottoms on everything from alpine skintracks to trail runs in shoulder season. They're breathable, warm, and don’t bunch or chafe. The articulated fit is top-notch for high-output movement in cold weather."

Whether we're skinning through glades or layering up for cold-weather runs, the Intraknit All-Season Merino Base Layer Bottom gives us versatile comfort for dynamic conditions. Smartwool blends soft Merino wool with TENCEL™ Lyocell for a breathable, moisture-wicking next-to-skin feel that keeps up with our toughest efforts.

Built with Intraknit™ technology, this base layer integrates targeted insulation, ventilation, and articulation zones to balance warmth and mobility without bulk. The slim, body-mapped fit and minimal seams reduce chafing and let us move freely—whether we're chasing first tracks or chasing daylight.