The Women's Smartwool Intraknit Colorblock Quarter-Zip Thermal Merino Base Layer is a slim fit top for cold weather activity. Ski, climb, tour, the possibilities are endless when your base layer is up to the challenge. The Intraknit technology provides incredible warmth with the help of a Merino wool and polyester fabric blend. It manages moisture, temperature, and resists odors for full days throughout the winter season. Equipped with a quarter zip neck for quicker temperature regulation, plus a bold color blocking for style back at the camp, lodge, or cabin.