Oh man, I once bought the most glorious winter coat at an army-navy store. Lightweight, cheap, and so warm.

Once I had money I discovered the glory of high-quality thermals, but if you don't have money and live in a cold house, you try to keep at least one room warm with a lot of closed doors, plastic on the windows and draft stopper door snakes if the house is drafty, warm socks, layers. Nobody without money is buying pregnancy corsets from Etsy to stay warm, what the shit is that.