REI’s goose-down vest is ideal for wintertime adventures — it’s light and compressible but still packs plenty of warmth. Their Polartec Power Dry Zip-T makes the perfect sweat-free base layer underneath. This cozy setup will keep you warm to the core, and, compared with other top-line brands, it’ll also leave you more pocket change for a hot chocolate at the end of the day. Vest is $80; shell is $33. Both at REI.