Oak,
It works fine with mummy bags, though I'll admit I've never tried it with a super lofty bag like a -20, partly because if I'm using a -20 bag, liquid water shouldn't be an issue.
With rectangular bags I could see one being large enough not to fit, but its design intentions are pretty much 180 from most rectangular bags, so I can see why Rab wouldn't go out of their way to accommodate them.
I don't recommend it to people (myself included), but I did take this bivy as my only shelter on a backpack hunt last year, and got rained on all night, and stayed dry. Thats probably what really sold me on this particular option.
Carl
It works fine with mummy bags, though I'll admit I've never tried it with a super lofty bag like a -20, partly because if I'm using a -20 bag, liquid water shouldn't be an issue.
With rectangular bags I could see one being large enough not to fit, but its design intentions are pretty much 180 from most rectangular bags, so I can see why Rab wouldn't go out of their way to accommodate them.
I don't recommend it to people (myself included), but I did take this bivy as my only shelter on a backpack hunt last year, and got rained on all night, and stayed dry. Thats probably what really sold me on this particular option.
Carl