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Big Agnes Greystone 0deg Sleeping Bag
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$369.95
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SKU: WX2*0741511
Overview
Built for cold-weather backpacking, this sleeping bag is aimed at hunters and backcountry travelers who need dependable warmth without unnecessary bulk. Its traditional mummy shape, contoured hood, and draft-blocking collar and zipper are designed to help hold in heat when temperatures drop. The recycled polyester shell and taffeta lining add a practical, modern material package, while the two-way zipper and pairing-compatible design offer useful flexibility in camp. It’s a focused choice for frosty nights where packability, comfort, and warmth all matter.
Why Hunters Choose the Big Agnes
600 Fill
Power DownTek RDS-certified down provides
Traditional Mummy
Shape supports lighter carry and
Recycled Polyester
PFAS-free water-repellent finish
Contoured Hood
Oversized no-draft collar help seal
65-inch Ykk
Two-way zipper and zipper garage
Key Features
- 600 fill power DownTek RDS-certified down insulation for cold-weather use down to 0°F.
- Recycled polyester ripstop shell and taffeta lining with a PFAS-free water-repellent finish.
- Traditional mummy shape helps reduce weight and improve body heat retention.
- Contoured hood, oversized no-draft collar, and no-draft zipper help seal out drafts.
- 65-inch YKK #5 anti-snag locking zipper with two-way zipper and zipper garage.
- Interior loops secure a liner for added warmth; exterior loops support hang drying or storage.
Best Used For
- Backpackers needing a 0-degree bag for cold-weather overnight trips
- Hunters wanting a mummy-style sleeping bag with draft-sealing features
- Users prioritizing compressibility, lightweight carry, and warmth in one bag
- Campers who prefer a contoured hood and room for pairing zip bags
- Cold-season travelers looking for recycled materials and PFAS-free water-repellent finish
Specifications
| Collar | Oversized no-draft collar |
|---|---|
| Cordlock | Low-profile cordlock |
| Draft Tube | Insulated tube along upper hood opening |
| Exterior Loops | Yes |
| Fill Power | 600 |
| Hang Dryingstorage Loops | Exterior loops for hang drying or storage |
| Hood | Contoured hood |
| Insulation | DownTek RDS-certified down |
| Insulation Type | DownTek(TM) insulation |
| Interior Loops | Yes |
| Leftright Zip Compatibility | Left- and right-zip bags can be paired together |
| Liner Compatibility | Interior loops secure a liner (sold separately) |
| Lining Material | Taffeta |
| Shape | Traditional mummy shape |
| Shell Material | Recycled polyester ripstop |
| Temperature Rating | 0degF |
| Water Repellent Finish | PFAS-free |
| Zipper | 65" YKK(R) #5 anti-snag locking zipper |
| Zipper Garage | Yes |
| Zipper Type | Two-way zipper |
Pros
- 600 fill power DownTek RDS-certified down provides listed warmth to 0°F
- Traditional mummy shape supports lighter carry and improved body heat retention
- Recycled polyester ripstop shell and taffeta lining with PFAS-free water-repellent finish
- Contoured hood and oversized no-draft collar help seal out cold air
- 65-inch YKK #5 anti-snag locking zipper with two-way zipper and zipper garage
- Left- and right-zip bags can be paired together for added versatility
Considerations & Trade-offs
- The traditional mummy shape prioritizes heat retention and packability, but it offers less room to move than roomier sleeping bag cuts.
- The 0°F rating and 600 fill power DownTek insulation are aimed at cold conditions, which can be more bag than needed for milder trips.
- The bag uses a 65" zipper rather than a full-length design, so ventilation and entry/exit are more limited than on longer-zip models.
- A liner can be added for extra warmth, but it is sold separately, so that upgrade adds cost and bulk.
Suggested Comparisons
- Cold-weather backpacking sleeping bag
- Mummy sleeping bag
- Down sleeping bag
- Sleeping bag liner
Suggested Accessories
- Sleeping bag liner
- Compression sack
- Sleeping pad
- Stuff sack
Frequently Asked Questions
What temperature is the Big Agnes Greystone 0deg Sleeping Bag designed for?
The product description says it is designed to keep you cozy down to 0°F.
What insulation does this sleeping bag use?
It uses 600 fill power DownTek RDS-certified down, also listed as 600 fill power DownTek insulation.
What kind of shell and lining materials are listed?
The bag is described with a recycled polyester ripstop shell and taffeta lining, both with a PFAS-free water-repellent finish.
Can this sleeping bag be zipped to another bag?
Yes. The description says left- and right-zip bags can be paired together.
What comfort and draft-control features are included?
Listed features include a traditional mummy shape, contoured hood, oversized no-draft collar, no-draft zipper, and an insulated tube along the upper hood opening to help seal out drafts.