Sonic -20 (2022)
$699.95
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Built to be the only bag you need from -20 F to 40 F, we've updated our Backpacker Editors' Choice award-winning big-mountain bag, Sonic, for even greater warmth, tuneability, and reduced environmental impact. With this bag, we are launching our next-generation Thermo Gills with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine-tuning of comfort from within the bag.
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