- Water-resistant synthetic fill insulates against the cold, even when conditions are damp
- Offset quilt construction provides even coverage and minimizes the formation of cold spots
- Shell is treated with a durable water repellent (DWR) finish that resists stains and moisture
- Relaxed mummy shape provides plenty of room to move while you sleep
- Face muffler and full draft tube keep cold air out of your bag
- Differentiated draw cords (1 round, 1 flat) let you adjust the hood and neck easily, whether it's the middle of the day or dark out
- Included 2-stage carry bag with mesh panels works well as a stuff sack and a ventilated storage bag
- Contains materials that meet the bluesign® criteria
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Our backpacking bags are rated for temperature according to an independent testing protocol: International Organization for Standardization (ISO) 23537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. For REI Co-op brand nongendered sleeping bags, we provide an overall temperature rating that falls between the Comfort and Lower Limit ratings.
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