The men’s 260 Tech Long Sleeve Half Zip Crewe by icebreaker is made for activities in the cold. Comfort this winter starts with a base layer of merino wool that regulates core temperature and breathes away excess moisture. The half zip at the top helps with ventilation. Offset shoulder seams prevent pack rubbing, while forward-set side seams provide more comfort. Flatlock seams eliminate chafing. Underarm gussets promote movement. The back hem is dropped for extra coverage.