Smartwool · Base Layers
The Intraknit Thermal Max Merino 1/4-Zip Baselayer is made from 100% merino wool for warmth, breathability, and odor control. It features Intraknit™ mapped zones for balanced heat and airflow, 3D-mapped construction for ergonomic comfort, and terry loop insulation for added warmth without bulk. The quarter-length zip provides ventilation, and reflective details enhance visibility. Its slim fit layers easily under midlayers or shells.