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Sierra Designs says:
Welcome to the most comfortable night’s sleep you’ll have in the backcountry. Hailed as Outside magazine’s “Best Sleeping Bag For Backpacking” and an evolution of our award winning Backcountry Bed, the Cloud features a zipperless design with an integrated comforter. Constructed with 15d nylon ripstop fabrics and 800 fill power DriDown™, delivering an ultra comfortable lightweight mummy. To top it off, the Cloud touts our patented self sealing foot vent and a pad sleeve, allowing you to vent heat and move around without worry.
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