Marmot · Sleeping Gear

Bantamweight 15 Sleeping Bag - Men's

Bantamweight 15 Sleeping Bag - Men's
40% OFF

$451.89

$754.65Save $302.76 (40%)

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Price Historylast 6 months

$527$490$452$451.89Feb 6May 1Today

Low $451.89 · High $527.49. Hover the line to see each change.

Is this a good deal?

  • The current price has held for 100 days.
  • Across the 37 Sleeping Gear deals we’re tracking right now, the median discount is 36% — this deal’s 40% off is right around that mark.

Based on prices we’ve recorded from REI since February 2026, refreshed several times daily.

About this product

The Marmot Bantamweight 15 is a men's mummy-style sleeping bag built for backpackers who prioritize low weight and packability. It is insulated with certified 900-plus fill-power goose down treated with Down Defender, a water-resistant finish that helps the fill maintain loft in damp conditions. The shell and lining are both 100% nylon ripstop, and the slim mummy cut reduces material weight while improving thermal efficiency. ISO testing places the comfort rating at 26 degrees Fahrenheit and the lower limit at 15 degrees Fahrenheit (negative 9 degrees Celsius). Smooth, curved baffles minimize down migration and cold spots, while freely adjustable drawcords let you cinch the hood for a secure fit. A center zipper provides convenient entry and exit. The Short size packs down to roughly 5.4 liters and weighs approximately 1 pound 6.3 ounces (about 454 grams), and a compression and storage sack is included.

Brand
Marmot
Material
100% nylon ripstop
Color
DARK AZURE/CLEAR BLUE
Size
Short - Center Zip: 6.3 x 12.6 inches
Fill
900+ fill-power goose down
Shell
100% nylon ripstop
Gender
Men's
Lining
100% nylon ripstop
Weight
Regular - Center Zip: 1 lb. 8.3 oz. Short - Center Zip: 1 lb. 6.3 oz.
Best Use
Backpacking

What people are saying

Reviewers consistently praise the Marmot Bantamweight 15 for its exceptional warmth-to-weight ratio, crediting the 900+ fill-power down and curved baffles for reliable insulation down to and below freezing. Its impressive compressibility makes it a favorite among thru-hikers and backpackers who prioritize pack space. The 7D shell fabric is noted as holding up reasonably well for its ultralight class. The most common complaint centers on the short chest zipper, which multiple reviewers find awkward to get in and out of. The snug mummy cut is also flagged as restrictive for broader-shouldered sleepers, and some note the bag runs closer to a three-season bag than a true 15-degree performer for cold sleepers.

Specifications

Packed weight
454 g
Temperature rating
-9°C
Down fill power
900 FP
Sleeping capacity
1

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