If you live in a location where winter exists, you know that a good coat is an investment you just have to make. Unless you want to end up freezing and seriously regretting your decision every time you go outside, it's not something you can or should buy cheap. It might cost you a bit more up front, but if you choose wisely, purchasing a sustainable, high-quality winter coat can last you a really long time. Here's what to look for and some of our favorite brands to shop from.