Filled with 800-fill ProDown™ insulation, the Summit Breithorn Lightweight Hybrid Hooded Jacket delivers consistent warmth and compressibility for technical climbs in sub-zero temperatures. The hybrid construction features an insulated body and an uninsulated, stretch-woven hood, sleeves, and side panels for exceptional freedom of movement. And when you need to move quickly and easily, you can pack it into your pocket, ready for your next adventure.