For maximum insulation when on belay or at basecamp, the thoroughly warm Summit AMK L6 Parka wraps us in reliable warmth. Innovative technology ensures thermal performance during the coldest moments and the burliest storms. Not only is this parka packed with 1000-fill down, but The North Face also created an asymmetrical baffle construction, Cloud Down, to maximize loft while keeping the heat-reflecting lining close to the body. This lets us keep our kit lightweight without sacrificing the cold weather protection that we need on frigid peaks.