The Arc'teryx Women's Rho LT Zip Neck is a versatile base layer top that is designed for high-output activities in cool weather. It is made with a combination of Torrent fabric and Merino wool, which provides excellent moisture management, insulation, and odor control. The zip neck design allows for easy ventilation, while the gusseted underarms provide freedom of movement. Whether you're skiing, snowboarding, or mountaineering, this top will keep you comfortable and dry.