I’m looking for a recommendation for a lightweight sleeping bag for winter camping. Temperature rating would need to be down to around -20C. I suspect there are a number of mountaineers / alpinists well positioned to make a recommendation, and I trust UA a lot more than other sites!
The reason I’m asking is that a splitboarding objective I want to complete is only (legally) do-able by winter camping. I’m only going to attempt it if visibility is good and that will typically mean clear skies and cool overnight temps, perhaps -10 to -30C based on experience in the area (Selkirks in BC). Of course, the combination of acceptable snow stability and good vis is relatively rare, but that’s a different story.
I’ve looked at offerings from Western Mountaineering, Feathered Friends, Mountain Hardwear, Mammut, Mountain Equipment (UK, not MEC in Canada) and Rab. So far, the best option seems to be the Rab Mythic 600 which has a measured weight of 885g and is rated to -16C. While my experience with Rab products has been decidedly mixed, it’s been OK for down.
Does anyone have any suggestions? I’m aware of Mark Twight’s suggestion, I think in Extreme Alpinism, to sleep clothed and buy a lighter, less warm bag, which is one option to save on weight (and money).
Thanks in advance.