How to Choose Sleeping Bags for Backpacking
REI Co-op Joule Sleeping Bag - Women's
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The waterproof, breathable shell fabric of this 3-season, premium women's REI Joule goose down sleeping bag keeps the downy warmth dry so you sleep like a baby.
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Fill
800-fill goose down
Temperature Rating (F)
22 degrees (F)
- Tested by an independent third-party lab using European Norm protocol, the EN temperature ratings allow direct comparisons across brands with other EN-rated bags
- Women-specific bags are cut to match a woman's shape, and provide extra insulation for enhanced warmth
- Waterproof, breathable shell is an ultralight, coated ripstop nylon designed to dissipate moisture from the inside and repel moisture from the outside, keeping the down dry
- 800-fill-power goose down is efficiently distributed for maximum warmth and compressibility; ultralight polyester mini-ripstop lining has a soft hand-feel
- Exclusive REI Down Fill Calculator optimizes the amount of down per baffle for the most warmth with the least amount of down
- 60% of insulation is put on top of bag where it contributes the most warmth and loft
- In-the-round pattern wraps vertical baffles around perimeter of sleeping bag, from head to foot, creating a 3-dimensional bag that wraps you in warmth
- Performance fit saves weight by reducing girth at shoulders, hips and lower legs while increasing thermal efficiency
- Baffle spacing is optimized to keep down in place and prevent cold spots
- Multi-chambered contour hood, insulated full-face muffler, puffy interior yoke, and full-length zipper draft tube with ground-level seams all work to keep heat in and cold out
- Trapezoidal footbox mirrors sleeping position for thermal efficiency and room to move
- External chest pocket keeps small essentials—headlamp, watch, glasses—right at hand and easy to find in the dark
- Includes nylon stuff sack and large cotton storage bag
- Differentiated drawcords (1 round, 1 flat) allow quick identification, even in the dark, so neck and hood adjustments are a cinch
- Any REI backpacking bag can be zipped to any other REI backpacking bag because of the consistent 63 in., No. 5, YKK zipper; women's bags zip on the right, men's on the left
- Zipper is backed by a wide, welded fabric flap that prevents snagging
- Pad loops provide attachment points to keep your sleeping bag and pad together, so you needn't worry about rolling onto the cold ground (straps sold separately)
- 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.
View all REI Co-op Backpacking Sleeping BagsEach 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.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 10 degrees (F) - EN |
| Tested Comfort | 22 degrees (F) - EN |
| Temperature Rating (F) | 22 degrees (F) |
| Temperature Rating (C) | -6 degrees Celsius |
| Shell | Coated nylon ripstop |
| Insulation Type | Down |
| Fill | 800-fill goose down |
| Lining | Polyester mini ripstop |
| Sleeping Bag Shape | Mummy |
| Stuff Sack Size | 8.25 x 18 inches |
| Stuff Sack Volume | 17 liter |
| Gender | Women's |
| Sustainability | From a Climate Label Certified brand |
Buying Advice
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
