REI Co‑op Magma 30 Sleeping Bag
Specifications
| Weight | Packed Size (L) | Warmth Rating | Fill Weight | Fill Power | Fill Type | Sleeper Height | Seasons | Shape | MSRP |
|---|---|---|---|---|---|---|---|---|---|
| 1 lb 8 oz | 7.5 | 30°F | 12.7 oz | 850 | Goose Down | 71 inches (Medium) | 3-season | Mummy | $349.00 |
Comfort & Warmth
The REI Co-op Magma 30 is designed to balance ultralight performance with all-night comfort, making it a versatile choice for three-season backpacking. Stuffed with 850-fill-power, Responsible Down Standard–certified goose down treated with a durable water repellent (DWR) finish, it retains loft and warmth even in damp conditions. The bag’s semi-fitted mummy shape reduces dead air space for better thermal efficiency without feeling restrictive, while the insulated yoke, full draft tube, and trapezoidal footbox work together to minimize heat loss in cooler temps. REI also offers the Magma 30 in nine sizes, including petite, regular, long, and women’s-specific cuts, ensuring a close fit that optimizes warmth for different body shapes. With a tested comfort around 34°F and a tested lower limit near 24°F (temperate rating 30°F), the Magma 30 is built to keep most backpackers comfortable on cool spring, summer, and early-fall nights.
Weight & Packability
The REI Co-op Magma 30 delivers impressive weight savings and packability for a fully featured three-season bag. Weighing just 1 lb 8 oz for the regular size, it’s among the lightest down bags in its warmth class, making it ideal for ultralight backpackers who don’t want to compromise on comfort. Its 850-fill-power goose down compresses exceptionally well, allowing the bag to pack down into a 7.5L sack or even a 4.3L compression sack, freeing up valuable space in your pack. The lightweight 15-denier Pertex® shell fabric further reduces bulk without sacrificing durability, so the Magma 30 slips easily into your pack and leaves room for the rest of your gear on multi-day trips.
Price
Priced at $349 for the regular version, the REI Co-op Magma 30 offers a rare blend of premium materials and thoughtful design at a cost that undercuts many competing ultralight down bags. While still an investment, it delivers features often found in higher-priced models—such as 850-fill-power, RDS-certified goose down, a Pertex® ripstop nylon shell, and a water-resistant DWR finish—making it a strong value for serious backpackers. The Magma 30’s price also reflects REI’s commitment to quality control, backed by their generous return policy and member dividends, which further sweeten the deal for frequent REI shoppers. For hikers seeking an ultralight, packable, and warm three-season sleeping bag without paying top-tier brand prices, the Magma 30 hits a sweet spot between performance and affordability.
Quality & Materials
The REI Co-op Magma 30 is built with high-end materials and construction that rival many premium ultralight brands. Its 850-fill-power goose down is Responsible Down Standard (RDS) certified for ethical sourcing and treated with a durable water repellent (DWR) finish to help it maintain loft and warmth in damp conditions. The 15-denier Pertex® ripstop nylon shell keeps weight low while offering impressive durability and breathability, and the soft, lightweight lining fabric adds comfort directly against the skin. Careful design details—like a full-length draft tube, insulated yoke, and trapezoidal footbox—enhance both warmth retention and durability, ensuring the bag performs well season after season. Combined with REI’s rigorous quality control and warranty support, these materials make the Magma 30 a trustworthy, long-lasting choice for backpackers who want premium performance without the boutique price tag.
Consumer Sentiment: Pros & Cons
Pros:
- Highly valued warmth-to-weight ratio
- Smart design details, like insulated yoke and anti-snag zipper
- Users appreciate its versatility: warm in cold nights, breathable when temps rise
Cons:
- Not suited for deep winter
- Ultralight seekers may find even lower weight options
Comparison to Competitors
Feathered Friends Hummingbird UL 20: The Magma 30 is roomier and more affordable than the Hummingbird UL 20, but it’s slightly heavier and less thermally efficient in colder conditions.
Western Mountaineering MegaLite 30: Compared to the MegaLite, the Magma 30 offers a more inclusive size range and a lower price, though it’s marginally heavier and uses slightly lower fill power down.
Kelty Cosmic Down 20: The Magma 30 is significantly lighter, more compressible, and made with higher-quality materials than the Cosmic Down 20, but comes at a much higher price point.
Who It’s Intended For
The Magma 30 is ideal for backpackers and thru-hikers seeking reliable three-season performance without premium-level cost. It’s an excellent pick for side or combo sleepers, thanks to its roomy cut, and those who value smart features like insulated collars and stash pockets. It’s not designed for extreme winter adventure but delivers solid performance spring through fall.
