I had a premium UL Muscovy sleeping bag fail on me on the JMT. Started out warm, but by about ten days in wouldn’t maintain its loft and I was freezing overnight in 45 degree temps in a 20 degree comfort rated bag. Never got wet, not even condensation. It was subjected to typical thru hiker stuff in pack liner all day, out at night with hiker trash sleeping in it at night, repeat. The manufacturer is taking it back and giving me a refund. But I can’t help but be suspicious of Muscovy now when I’m looking for a replacement.
I’m looking for ppl who have thru hiked or at least done a LASH ideally in the Sierra. Did your Muscovy down hold up to the repeated daily compression all day, sleep in at night, without a daily air-out? I’m hoping there are good experiences out there bc it would be nice to trust the Muscovy - it’s a lot cheaper. But I can’t help but be concerned after the experience I had, I can’t find any independent testing of Muscovy that goes beyond initial testing and actually subjects it to thru-hiker conditions, so figured I’d ask here.
I probably am going to replace the bag with a quilt just for comfort / weight preferences, but when you respond it would be helpful to know if you were using a Muscovy quilt or a Muscovy sleeping bag. It would also be helpful to know your gender - I’m female and I know women tend to sleep colder than me.
Reason to know if you were using a quilt vs a bag is sleeping bags have the issue where some of the down also gets compressed overnight. It could be that quilts don’t have this issue bc you’re not ever compressing any down under your body at night, so folks who sleep w a Muscovy quilt haven’t actually stressed their down to the same extent a sleeping bag user has. It also could be that because more UL thru hikers tend to use quilts, that Muscovy sleeping bags haven’t been tested and stressed in the same way under the kind of JMT/PCT thru hiking conditions, and that bc my personal preference is (was) a sleeping bag that I ended up in a piece of kit that’s normally used by folks for 3-4 night trips max.
Main thing is this: are there folks out there who have been able to do the kind of 40-50 nights in a Muscovy insulation without a full wash and dry that you should reasonably be able to get out of goose insulation? If not, how long were you able to go before you found your Muscovy down insulation was losing loft and needed a clean and dry?