What Our Gearhead(R) 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(TM) Lyocell for a breathable, moisture-wicking next-to-skin feel that keeps up with our toughest efforts. Built with Intraknit(TM) 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.