If you're worried about down failing at the slightest hint of moisture, try washing your sleeping bag sometime in the bath tub. It is darn tough to "wet out" down. For the Sierra's I bring a cheap down coat I got off of Amazon. It is similar to the cheap down coats people buy from Costco (but I don't have a membership). Its light, packs small, and ~$40. Probably not as durable or as nicely sewed as something from one of the fancy manufacturers. I think the search terms I used was: "packable down jacket". Quite a few options at quite a few price ranges/star ratings.

edit: this seems pretty close to what I got: https://www.amazon.com/dp/B07C1XTDMD/ref=emc_b_5_t


Edited by BZH (03/19/19 07:32 PM)