Our midweight 100% Merino baselayer for the coldest days of the year, the men's tech top long sleeve half zip features our 260gm Bodyfit fabric for bone-chilling temps on the ski hill, the trails or around town. The updated slim fit optimizes layering performance and next-to-skin comfort, and we added offset shoulder seams and forward set side seams to reduce chafing when you're wearing a pack or moving fast. The half-zip design also makes for easy temperature regulation during high-output days or variable temperatures.