The Women's Smartwool Classic Thermal Merino 1/4 Zip Base Layer features a slim fit that contours the body for a flattering, streamlined silhouette. Crafted from premium Merino wool, the fabric offers superior moisture management, temperature regulation, and odor resistance for all-day comfort. The back body seam wraps to the front for a tailored look, while raglan sleeves allow for a full range of motion. Flatlock seam construction increases comfort and reduces chafing, making this base layer an essential cold-weather staple.