Intraknit Thermal Merino Base Layer Bottom – Women's

Built for high-output cold-weather days on the mountain, this base layer bottom is our pick for women who need warmth without overheating. Smartwool's Intraknit construction knits ventilation zones and insulation directly into the fabric, so heat dumps where you need it and stays where you don't. The slim merino blend fit layers clean under ski pants with no bunching.

• Intraknit 3D construction integrates mesh ventilation zones and insulation in a single knit — no seams, no bulk, no hot spots
• 52% Merino wool blend naturally regulates temperature, wicks moisture, and resists odor through long days in the cold
• Slim, mid-rise fit layers efficiently under ski pants or hiking softshells without adding bulk at the waist or thighs
• Best for skiing, snowboarding, winter hiking, and mountaineering — anywhere you need warmth that moves with you
• Available in Black-White, Emerald-White, and Nightfall Blue-Deep Navy in sizes XS–XL