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ATEPA PROMOTER 850 Ultralight Down Mummy Sleeping Bag | 850g 650FP Coldmaster(TM) Down, 17.6degF Limit Rating, 20D Nylon Shell
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SKU: atepa-promoter-850-ultra-light-mummy-sleeping-bag
Overview
Built for cold-weather nights when pack space and warmth both matter, this ultralight mummy sleeping bag is aimed at backpackers, alpine trekkers, and winter campers who want a down-filled option that compresses small. Its 850g of 650FP Coldmaster white duck down, 17.6°F limit rating, and contoured hood, chest baffle, and draft tube are all focused on retaining heat in a single-person setup. The wider cut gives more room than a standard mummy bag, which can be welcome for side sleepers or anyone who prefers a little extra space without giving up thermal efficiency. With a down-proof nylon shell, water-repellent finish, and included compression and storage sacks, it is designed for trips where warmth, packability, and careful storage all matter.
Why Hunters Choose the Atepa
850g 650fp
Coldmaster white duck down provides
3.64 Lbs
Total weight supports backpacking without
17.6°f Limit
Rating suits cold-weather three-season and
20d 400t
Nylon shell and lining are
Includes Quad-compression
Sack, square stuff sack, and
Key Features
- 850g of 650FP Coldmaster white duck down fill in a 90/10 down ratio.
- ISO temperature ratings: 30.2°F comfort, 17.6°F limit, and -14.8°F extreme.
- Ultralight 3.64 lb total weight for backpacking and backcountry travel.
- Compresses to 15 x 9 inches for compact packing.
- 20D 400T nylon shell and lining with down-proof, water-repellent Grade 4 treatment.
- Mummy shape with 3D chest baffle, draft tube, and adjustable hood for heat retention.
- Includes quad-compression sack, standard square sack, and mesh storage bag.
Best Used For
- Cold-weather backpackers needing a compact bag for 3-season and early winter trips
- Alpine trekkers and high-altitude campers packing for colder overnight conditions
- Hunters who want a roomy mummy bag with efficient heat retention
- Side sleepers seeking extra width without giving up packability
- Car campers and overlanders who value premium down insulation and easy storage
Specifications
| Capacity | 1 Person |
|---|---|
| Fill | 850g Coldmaster(TM) 90/10 White Duck Down |
| Fill Power | 650 FP |
| Included Accessories | Quad-Compression Sack, Standard Square Sack, Mesh Storage Bag |
| Lining Material | 20D 400T Nylon Taffeta |
| Packed Size | 15" L x 9" Diameter (38 x 23 cm) |
| Shape | Mummy |
| Shell Material | 20D 400T Nylon Taffeta |
| Temperature Rating Comfort | 30.2°F (-1°C) |
| Temperature Rating Extreme | -14.8°F (-26°C) |
| Temperature Rating Limit | 17.6°F (-8°C) |
| Unfolded Size | 82.68" L x 37.4" W x 25.6" Foot (210 x 95 x 65 cm) |
| Weight | 3.64 lbs (1.65 kg) |
| Zipper | YKK Self-Locking Two-Way with Anti-Snap Guard |
Pros
- 850g of 650FP Coldmaster white duck down provides substantial insulation
- 3.64 lbs total weight supports backpacking without excessive bulk
- 17.6°F limit rating suits cold-weather three-season and early winter use
- 20D 400T nylon shell and lining are down-proof with water-repellent treatment
- Includes quad-compression sack, square stuff sack, and mesh storage bag
- Spacious 82.68-inch by 37.4-inch mummy cut allows comfortable movement
Considerations & Trade-offs
- The mummy shape is designed to reduce dead air space, so it may feel more restrictive than roomier sleeping bag styles for users who prefer extra freedom of movement.
- The 17.6°F limit rating is colder than the comfort rating of 30.2°F, so conditions near the lower end of the range may require careful layering and site selection.
- At 3.64 lbs, it is still a substantial carry for ultralight-focused trips where every ounce matters, even though it packs down small.
- The 20D nylon shell and lining are lightweight by design, which supports packability but may call for a bit more care than heavier fabrics in rough camp use.
Suggested Comparisons
- Down sleeping bags
- Mummy sleeping bags
- Cold-weather backpacking sleeping bags
- Ultralight sleeping bags
Suggested Accessories
- Sleeping bag liner
- Compression sack
- Sleeping pad
- Pillow
Frequently Asked Questions
What temperature range is the ATEPA PROMOTER 850 rated for?
The ISO temperature ratings listed are Comfort 30.2°F (-1°C), Limit 17.6°F (-8°C), and Extreme -14.8°F (-26°C).
How much does the sleeping bag weigh and how small does it pack down?
It weighs 3.64 lbs (1.65 kg) and compresses to 15" x 9" (38 x 23 cm).
What type of insulation does it use?
It uses 850g of 650FP Coldmaster(TM) white duck down in a 90/10 ratio.
What are the shell and lining materials?
The shell and lining are listed as 20D 400T nylon taffeta with a down-proof, water-repellent Grade 4 treatment.
What comes included with the sleeping bag?
The package includes the sleeping bag, a quad-compression sack, a standard square sack, and a mesh storage bag.