Sure do! It's at these temps that they really work well. Sealed up tight unlike nylon the moisture is IN the fabric, no snow shower when you get out. Blocks the wind, though with as windy as this trip was a tarp is almost mandatory, and breathes which is necessary to eliminate condensation. Fireman and I have a season in them, as do a couple others I know, and while there is a learning curve they really are effective, heavy but worth the weight.
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