Ultralight, warm, and packable-the Rab Mythic Alpine Down Jacket ticks all the boxes that matter for our fast and light mountain missions. The Pertex Quantum ripstop fabric keeps our weight down while providing abrasion-resistance, and the 900-fill power goose down delivers a ridiculous warmth-to-weight ratio while packing down small to take up a little pack room as possible. With a slim fit and low bulk, the Mythic layers well under a shell, pack, or harness while the articulated fit and baffles keep our arms free for easier climbing, skiing, and mountaineering movements.