A premium backpacking bag for cold, wet conditions, the REI Magma Sleeping Bag features REI's double-protection design, which uses both water-repellent down and waterproof/breathable fabric panels.
Fill
700-fill duck down
Temperature Rating (F)
10 degrees (F)
- With a European Norm (EN) lower-limit rating of 10°F, this bag is suitable for 3-season use and some winter outings
- REI double-protection design combines a polymer-coated down fill with waterproof/breathable fabric at the hood, sides and foot, the areas most likely to touch a damp tent wall
- Water-repellent 700-fill-power duck down offers superior loft and warmth
- Ripstop nylon shell also features a durable water repellent finish to further protect the down fill
- Performance fit keeps weight low and thermal efficiency high
- REI in-the-round design puts vertical baffles in side walls to wrap you in warmth and create a better fit than bags that use only horizontal baffles
- Contoured hood, draft collar and full-length draft tube all work to keep warmth in
- Differentiated hood and neck drawcords simplify adjustments; antisnag zipper works smoothly
- Bag zips on the right-hand side
- The REI Magma Sleeping Bag includes a nylon stuff sack and a large cotton storage bag
- European Norm (EN) is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags
- REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits
Imported.
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) | 10 degrees (F) |
| Temperature Rating (C) | -13 degrees (C) |
| Shell | Ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 700-fill duck down |
| Lining | Mini-ripstop nylon |
| Sleeping Bag Shape | Mummy |
| Stuff Sack Size | Unavailable inches |
| Stuff Sack Volume | 15 liters |
| Gender | Unisex |
| Sustainability | From a Climate Neutral Certified brand |