Random tip: Uniqlo is an usual but excellent source for inexpensive hiking/backpacking/lightweight travel clothes. In particular: the UL down jackets/parkas (~9.5oz in size M), HeatTech Extra Warm baselayers, Airism underwear, wind jacket, and socks/gloves. You see a ton of this stuff out on any long distance trail (it’s high quality enough to last an entire thru-hike and beyond).

Once you put on the HeatTech extra warm leggings, you’ll understand why superheroes wear tights—they’re the bomb.