Outdoor Research Incandescent Insulated Jacket
Easily the warmest jacket here, the is literally stuffed with primo 800-fill down, but it鈥檚 still compressible enough to pack into its own pocket, making it great for overnight winter excursions. 1 lb
Ibex Wool Aire Insulated Jacket
Instead of down or synthetic insulation, the (like the SmartWool jacket) is stuffed with wool batting. It鈥檚 as toasty as a synthetic jacket of the same weight but will keep you warm when wet. 12.3 oz
Stoic Hadron Insulated Jacket
The elastic wrist gaiters on the 850-fill are a smart and simple way to seal in heat. Plus, without a zipper, the pullover is ultralight and layers well under a shell. It packs down to the size of a softball. 7 oz
Helly Hansen H2 Flow Insulated Jacket
Holes in the jacket鈥檚 inner fleece trap heat when you need it. When you don鈥檛, and you crack the front ventilating zips in the ripstop shell, they help the jacket transfer heat away from your body. It works鈥攆or the most part. The is great when you鈥檙e moving quickly (snowshoeing, backcountry skiing), but it鈥檚 a midlayer at its best on colder days. 15.4 oz
Canada Goose Burnett Insulated Jacket
This is warmer than it looks. Credit the 625-fill duck down, heavy-duty knit cuffs that keep out drafts, and burly DWR-coated polyester and cotton exterior. The Polartec soft-shell hood is removable. 2.5 lbs
Patagonia Nano Puff Hybrid Insulated Jacket
Half fleece, half puffy鈥攖his insulating midlayer doubles as a full-on jacket, thanks to PrimaLoft insulation and a water-resistant, recycled-polyester shell around the chest. The arms and midsection are covered in Patagonia鈥檚 R2 fleece, which helped the vent heat during morning skins. 11.4 oz