>>2513878Proton LT jacket/hoody. Absolute gold standard for active loft insulation. Not as breathable as patagonia nano air but a bit more durable, and the patterning is way better than patagonia's box fit.
My go to for cold weather ice climbing, hiking, snowshoeing, and skiing. Best over just a base layer, works amazing under a shell. Not great as a stand alone jacket because of the poor wind resistance and trim fit