When hiking I'd always have my sleeping bag inside a drybag and inside my rucksack.
Do folk do the same when bikepacking even though the saddle bag is also waterproof?
Packing and space wise it'd be better without the dry bag, but a wet sleeping bag would suck
Always.
I use a harness & dry bag system so it's kind of a moot point in my case but I always aim to keep the dry stuff dry.
Inside either a bivi bag or a bin liner in the saddlebag. So yes essentially.
Always.
Walking, cycling, doesn't matter what. In UK a sleeping bag is vital for safety.
Cheers, I'll stick it in a drybag then.
Why are saddle bags waterproof if no-one trusts in their waterproofness?
Yep. Wet sleeping bags have made for some of the worst camping experiences I've had.
I assumed my new seatpack was waterproof (it has a drybag closure), but this prompted me to check. Turns out it isn't (rummages around for spare drybag...)
Cheers!
I don't keep my quilt in a separate dry bag. My bar mounted alpkit airlok is water proof so it just gets stuffed in there with other things I want to keep dry, sleeping mat, pillow, down jacket etc. Never had an issue with it getting wet in 8 odd years I've been bike packing.
One thing to consider, is that you may need to put your sleeping bag in the same bike bag as something that is damp/wet, so it's best to be able to keep it in it's own drybag
Depends on the time of year and the weather.
Summer synthetic bag just gets strapped to the handlebars in its stuff sack. Because even that meager protection isn't going to get it wet enough to be a major issue.
Winter down bag, goes in the alpkit dualock bag.
It did occur to me the other day whilst riding that the lack of extra faff and need to package it might actually save more weight and time than an even lighter down bag which I'd been saving up for.
Why are saddle bags waterproof if no-one trusts in their waterproofness?
Same reason prisons have guards as well as walls.
Webservices have IP whitelist as well as user authentication
Cars have airbags as well as seatbelts.
etc
It's not so much that I wouldn't trust a bar/saddle bag drybag to be waterproof, it's more that you might end up having to put other wet stuff in there with it, or maybe for some reason you have go rummaging about in there with your wet hands/sleeves in the pouring rain.
As others have said it's potentially a trip-ruining event if your sleeping bag gets wet so given there's no real penalty I'd always have some second line of defence.
Jnr did his gold DofE this week - was very grateful his sleeping bag was in a drybag.
Dry sack for my 3 season bag is about 50g. No brainer, and that's in my pack, not strapped to a bike.
I pack mine inside my waterproof bivvy bag.
I use my bivvy bag as my emergency shelter.