Smartwool Women's Intraknit Thermal Merino Wool Base Layer Crew (Slim Fit), Marmalade-Pecan Brown, Medium

COLD WEATHER BASE LAYER. This lightweight top is made for all of your most extreme cold-weather activities. It features Merino Sport yarns and gender-specific ventilation to maximize thermoregulation and breathability during high-intensity activities.

SLIM FIT. Designed to meet the demands of outdoor adventuring, this slim fit quarter zip shows off a slimming silhouette while offering unrestricted movement through the arms and chest.

INTRAKNIT THERMAL MERINO. Ideal for cool to cold weather, this lightweight 3D-knit with Merino Sport yarn offers gender-specific ventillation to maximize thermoregulation and breathability during high-intensity, sweat-inducing activites.

WHY MERINO WOOL? Thinner and softer than regular wool, it's easy to wear next to skin. Each fiber transports sweat away as a vapor (we tested it ourselves) and regulates body temperature to keep you cool in summer and warm in winter.

FUNCTIONAL FEATURES. Go far, feel good with thoughtful tech to keep you trekking comfortably — seamlessly knit mesh ventilation keeps you dry and comfortable while ribbed elbows provide added durability.