Two sleeping bags worth lining up side by side. The Magma 15 takes a modest overall edge, led by warmth, but the Wraptor 15 Down has its own case.
| REI Co-op Magma 15 | Marmot Wraptor 15 Down | |
|---|---|---|
| GearScore | 85✓ | 82 |
| Comfort rating | 21 °F✓ | 22 °F |
| Weight | 2 lb 3.6 oz✓ | 2 lb 13.6 oz |
| Warmth-to-weight | 4.9 /100g✓ | 3.7 /100g |
| Packed size | 8.0 L | 7.9 L✓ |
| Fill power | 850 FP✓ | 650 FP |
| Price | $399 | n/s |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Magma 15 in blue, Wraptor 15 Down in amber. A blank spec is never counted as a win. A lower comfort rating in °F means a warmer bag, so the warmer bag takes that row. GearScore is the overall rating (0 to 100); re-weight it on the full bag comparison. Prices are current MSRP.
The REI Co-op Magma 15 and Marmot Wraptor 15 Down take different routes to the same job. The Magma 15 wins on warmth and low weight, and the Wraptor 15 Down pushes back on packability.
The Magma 15 is warmer (rated 21°F vs 22°F), 10 oz lighter, and stronger on warmth-to-weight. The Wraptor 15 Down is a touch more packable. On the default GearScore the Magma 15 leads 85 to 82.
Pick the Magma 15 if you care most about warmth and low weight, which makes it the better call for colder nights and shoulder-season trips. Pick the Wraptor 15 Down if packability matter more to you, or you are focused on saving space in your pack.
The REI Co-op Magma 15. It is warmer (rated 21°F vs 22°F) than the Wraptor 15 Down.
The REI Co-op Magma 15. It is 10 oz lighter than the Wraptor 15 Down.
The REI Co-op Magma 15, 85 to 82 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Magma 15 for warmth, or the Wraptor 15 Down for packability. The spec table above shows exactly where each wins.