Sitka Core Merino 330 Half-Zip - Built for frigid late-season sits, the heavyweight Core Merino 330 Half-Zip features the warmest-weight merino wool to keep you warm in the coldest conditions. And to prevent sweat from leaving you wet and cold, an added synthetic interior will rapidly move moisture away from your skin and through your system to keep you dry and warm. Lightweight and durable 330-gram, 17.5-micron ArmorSpun Merino Wool exterior fabric Recycled synthetic interior for anti-itch comfort and improved moisture management Easy-care merino wool can be washed and dried with your regular laundry Snag-preventative stitching along sleeves resists abrasion from your pack Zippered chest pocket safely stores your valuables Low-profile integrated thumb holes for easy layering Total weight: 425g Style: 600151