Icebreaker's midweight 100% Merino baselayer for the coldest days of the year, the Men’s Tech Top Long Sleeve Half Zip features 260gm BodyFit fabric for bone-chilling temps on the ski hill, the trail, or around town. The updated slim fit optimizes layering performance and next-to-skin comfort. Icebreaker added offset shoulder seams and forward-set side seams to reduce chafing when you’re moving fast or wearing a pack. The half-zip design also makes for easy temperature regulation during high-output days or variable temperatures.