double sleeping bag or 2 zip together ones?
me and my wife are heading up to the arctic in 3 weeks, we would like a double sleeping bag, but it seems that all the double ones dont have a low enough temp rating, bearing in mind its going to be as low as minus 20C.... it seems the only real option is to get 2 zip together bags, but they have such a dumb shape, with that funnel shape, any input greatly appreciated....
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