I’m looking for a super warm winter coat that will last me forever. Something that will keep me warm around -30 C. I’m thinking military surplus, because it should theoretically be more durable (right?).
Price isn’t a huge issue if the quality is worth it.
look at mammut “eiger” range of coat https://www.mammut.com/ch/de/eiger-extreme can be repaired and is built like a tank for civilians in extreme conditions
the best is its class https://www.mammut.com/ch/de/products/1013-04080-2291/eiger-nordwand-pro-down-in-hooded-parka-men can be resold and keep its value too, it is an investment…
But you should get something lighter if you are constantly moving, this is for artic conditions :-)