The men’s BodyfitZONE 260 Zone Long Sleeve Crewe by icebreaker is for high output activities at high altitudes. Merino wool regulates core temperature and breathes away excess moisture. A touch of Lycra provides stretch. Merino mesh panels are strategically placed for venting. The hood fits snug and has a zip for venting. Flatlock seams eliminate chafing. Raglan sleeves and underarm gussets promote movement. The front and back hems are dropped for extra coverage.