This ridiculously light Hi-Tech jacket (11.8 oz) belongs in your hunting kit. Rarely does such light packable insulation test out as one of the best warmth-to-weight solutions on the market. And when you factor in the 850 Fill HyperDry down and super hi-tech Pertex Quantum Shell, you're not gonna want to go on a cold backcountry hunt without them. Enough said.