Icebreaker W 260 Tech LS CreweThe 260 Tech Long Sleeve Crewe is an incredibly warm merino base layer designed for the coldest months of the year. It is ideal for skiing, snowshoeing and other winter pursuits, making it the go to piece for winter layering. Features Soft merino fibers that regulates body temperature in all weather conditions and resists odors Gusseted underarms for mobility and comfort Offset shoulder seams to prevent friction Flatlock seams to prevent friction