Gear
REI Co-op Magma 15
Three-season backpacking and mild shoulder-season bushcraft
Expert reviewed
Topic summary
Three-season backpacking and mild shoulder-season bushcraft
Key takeaways
- 850-fill down
- lightweight backpacking mummy
- Excellent warmth-to-weight performance and a refined design make it a strong non-expedition option.
Verification notes
Evidence: expert reviewed. Last verified July 16, 2026.
Editorial take
REI Co-op Magma 15 is a cold-weather sleeping bag with an advertised 15°F rating and 850-fill down; lightweight backpacking mummy. It is best suited to three-season backpacking and mild shoulder-season bushcraft.
Not ideal for
- Not a deep-winter bag
- the trim cut may not suit broad sleepers.
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Verified specifications
- Key features
- 850-fill down
- lightweight backpacking mummy
Warranty and repair information: contact REI Co-op directly for the most current terms. REI Co-op support
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Data sources & verification
- Manufacturer: REI Co-op
- Last verified: 7/16/2026