Active insulation does not need to be heavy or bulky. Combining the lightest GORE-TEX SHAKEDRY™ outerlayer with POLARTEC® ALPHA® Insulation creates a highly breathable and packable jacket. This jacket is like nothing you’ve worn before – the outer layer will never wet out. The insulation material plus vent options make the jacket immensely breathable. Whether it’s a strenuous scramble to the summit or stopping to take in the view when you get there, this jacket will respond to your needs. A big part of staying warm is moving sweat away from the skin. This is the core philosophy in GORE® Wear’s creation of outerwear made for high aerobic pursuits. Innovative ideas like tapering the insulation towards the lower arm creates less restriction when moving, and less weight to carry on your way to the top. This jacket can be used with a backpack.