Designed for real mountaineering situations where space is at a premium and extra weight is a killer, the Mammut Broad Peak Light IN Jacket comes in featherlight and warmer than a lava flow running down your chest. The 850 fill 90/10 goose down insulation keeps you warm and comfortable in the harshest conditions yet weighs next to nothing and packs down small for easy storage in your pack while an athletic cut gives a low profile fit, perfect for layering under a shell and maintaining mobility.