The Rab Mythic Alpine Jacket is intended for those who move fast and light in the mountains, for those looking for an extremely warm down jacket that is easy to climb in, stash, and throw on when you need an instant boost of heat. Almost mythical 900 fill-power goose down provides an incredible warmth to weight ratio, and it's treated with Nikwax fluorocarbon-free DWR treatment to help resist the inevitable moisture. It has a lightweight, low-bulk, stitch-through construction to stabilise the down while allowing excellent breathability. Square baffles around the core keep you warm, while regular baffles on the sleeves keep you mobile. The sleeves are pre-curved and articulated to allow for easy arm lift, movement, and articulation while climbing. Mythic Alpine Down Jacket - Men's