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So I just got my hands on a 70's super-high end sleeping bag. To be honest, it's not that different from my nicer sleeping bag and was originally rated to a much lower temp. Aside from a slightly bulkier zipper, and slightly thicker silnylon it's pretty much the same.
The trouble is it's been stored in a tight stuff sack for a few decades. Does anyone have experience with old down that's been stored compressed? Is this even worth trying to revitalize? Pic is somewhat related