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REI Co-op Magma 30 Sleeping Bag Blue Medium

REI Co-op Magma 30 Sleeping Bag Blue Medium

3.7· 47 ratings

Best price now

$243.93at REIObserved Nov 3, 2026, 2:11 PM

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Our take on the REI Co-op Magma 30 Sleeping Bag Blue Medium

The REI Co-op Magma 30 is a three-season mummy bag filled with water-resistant 850-fill down, rated to a 30°F comfort limit and ISO-tested to a 24°F lower limit. It packs small for backpacking and weighs little for a down bag at its price. The best new price is $243.93 at REI as of November 4, 2026, and only one store lists it new, so there is little discounting to shop around for.

Best forThree-season backpackersCold sleepers who want a 30°F down bagCampers who value packabilityBuyers who want water-resistant down
Pros
  • Water-resistant 850-fill down sheds condensation and light damp
  • ISO-tested ratings give a realistic comfort figure
  • Packs small and light for a down mummy bag
  • Full-length left-side zipper with draft collar and hood
Cons
  • Only one new-price seller, so little price competition
  • 30°F rating is too warm-weather for winter use
  • Mummy cut is snug for side sleepers
  • Down needs more care than synthetic fill

REI Co-op Magma 30 Sleeping Bag Blue Medium prices at every store

  • REINew

    In stock

    $243.93Observed Nov 3, 2026, 2:11 PM
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REI Co-op Magma 30 Sleeping Bag Blue Medium price history

Lowest price we've seen: $243.93 on Nov 3 at REI. Tracked across 1 store since Nov 3.

What reviewers say

Owner feedback is mixed, averaging 3.7 out of 5 from 47 ratings. Many praise the warmth-to-weight ratio and pack size; others report the rating runs cold for them or that the fit is tight.

Pros
  • Light and compressible for backpacking
  • Warm for its weight in mild conditions
  • Water-resistant down handles damp nights
Cons
  • Some sleepers find it colder than the 30°F rating
  • Snug mummy fit
  • Durability concerns from a few owners

Specifications

Tested Lower Limit
24 degrees (F) - ISO
Tested Comfort
34 degrees (F) - ISO
Temperature Rating (F)
30 degrees (F)
Temperature Rating
-9 degrees
Zipper Location
Left
Insulation Type
Down
Water-Resistant Down
Yes
Sleeping Capacity
1-person
Sleeping Bag Shape
Mummy

Questions and answers

Is the Magma 30 warm enough for three-season camping?
Yes for most people in spring through fall. The ISO comfort rating is 34°F and the lower limit is 24°F, so pair it with a pad rated for the conditions.
How does it compare with the REI Magma 15?
The Magma 15 is the colder-weather version, rated about 15°F warmer. Choose the 30 for summer and mild shoulder seasons, the 15 for freezing nights.
What does the bag weigh and how small does it pack?
It is a lightweight down mummy that compresses to roughly the size of a football in its stuff sack. Check the listed weight for your size before buying.
Is the down treated for wet conditions?
Yes. The down is water-resistant, which helps in damp tents and light condensation.
When is the best time to buy it?
REI discounts its house-brand bags during member sales and end-of-season clearances. The current best new price is $243.93 at REI as of November 4, 2026.
Where is the REI Co-op Magma 30 Sleeping Bag Blue Medium cheapest?
At REI, for $243.93, as of our latest check.
What do buyers say about the REI Co-op Magma 30 Sleeping Bag Blue Medium?
Rated 3.7 out of 5 from 47 ratings.

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