The Hybrid Mapped construction of the Outdoor Research Women's Deviator Hooded Insulated Jacket makes it ideal for highly aerobic alpine ascents. The front and sides are made of nylon ripstop and contain Polartec Alpha synthetic insulation to keep your core warm. The arms, hood, and back use Polartec Power Dry stretch fabric to let you move freely and to dissipate heat where you sweat the most. A stretch mesh lining keeps everything from feeling clammy inside, while the Polygiene Active Odor Control treatment will have you at your freshest, all the time. Thumbholes help keep everything secure when you're reaching high above your head, and the flat seam construction ensures chafe free comfort all day long.