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#3 on this list
Magma 30
REI Co-op
Excellent 850-fill bag at a mid-tier price. Best value quality down bag on the market.
- Price
- $269 MSRP
- Reader rating
- No reader votes yet
- How we assessed it
- Specification researched
#4 on this list
Spark 28°F
Sea to Summit
Ultralight down mummy — a great backpacking bag when every gram counts.
- Price
- $269 MSRP
- Reader rating
- No reader votes yet
- How we assessed it
- Specification researched
Specs side by side
| Spec | Magma 30 | Spark 28°F |
|---|---|---|
| Temperature Rating | 30°F (Women's ISO Comfort: 39°F) | 28°F / -2°C (EN Limit) |
| Insulation Type | 850-fill-power goose down | — |
| Shell Fabric | Pertex Quantum nylon | 10D Nylon |
| Weight (Regular) | 1 lb. 4 oz. | — |
| Zipper Side | Left | — |
| Fill Power | — | 850+ Loft ULTRA-DRY Down |
| Lining Fabric | — | 7D Nylon |
| Zipper | — | Half-length YKK #3 |
| Packed Size (Reg) | — | 3.5L |
What our reviewers liked and didn't
Magma 30
- Excellent warmth-to-weight ratio for the price
- High-quality 850-fill-power down with DWR treatment
- Good packability for backpacking trips
- Comfortable lining and effective draft control
- Smooth-operating, anti-snag zipper
- Hood fit can feel a bit snug for some
- Not the absolute lightest option on the market
- No integrated pad straps
Spark 28°F
- Exceptional warmth-to-weight ratio
- Incredibly lightweight and packable
- High-quality 850+ fill-power ULTRA-DRY Down
- Effective at retaining heat for its weight class
- Streamlined design for minimalist adventurers
- Fabrics are very delicate; requires careful handling
- Snug mummy fit may feel restrictive for some sleepers
- Half-length zipper limits ventilation options
- Higher price point due to premium materials
Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.