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A warm and dependable down sleeping bag suited to colder three-season and winter conditions
Big Agnes says:
Our Greystone 0° mummy-style sleeping bag delivers value and performance in a lightweight bag with sustainability in mind. Ideal for backpacking but versatile enough for couch surfing, the Greystone sleeping bags feature 650 fill DownTek™ insulation, recycled shell and lining fabrics, and a water-resistant coating to repel moisture. This bag is your ticket to getting out there in comfort and warmth!
Our Verdict
The Greystone 0 follows a traditional mummy shape, balancing warmth with a slightly more relaxed fit than technical alpine bags. It feels comfortable to settle into while holding heat effectively. The 650-fill down provides solid insulation for late spring and summer trips.
At 1562g, it is not aimed at lightweight setups, but the pack size remains reasonable for this category. The outer fabric feels more durable yet light. The treated down performs better in damp conditions than untreated fill, helping maintain loft in damp conditions.
Overall, it offers a reliable and comfortable option where warmth and durability take priority over weight.
- Reviewed by Ultralight Outdoor Gear
Features
- Our All-Gender Greystone bags deliver technical, lightweight performance to excel on and off the trail with high thermal value, compressibility, and comfort wherever you go
- Water repellent coating without intentionally added PFAS keeps you dry without the use of harmful chemicals
- Traditional mummy shape allows for light weight and increased body heat retention
- Contoured hood follows the shape of your head for a more comfortable fit
- Oversized no-draft collar and no-draft zipper to keep the cold out
- Low-profile cordlock lets you uncinch the hood with one hand
- Insulated tube along upper hood opening seals out drafts when cinched
- 65"/165cm YKK #5 anti - snag locking zipper for a smooth, quick zip
- Two-way zipper and Zipper Garage positioned on sleeper's left side of bag
- Mate together left (All-Gender) and right (Women's) zip bags to share warmth with your tent mate
- Interior loops secure a liner for added warmth - liner sold separately
- Exterior loops for hang drying or storage
Specifications
Regular -
- Weighs: 1562g
- Fits: fits up to 183cm
- Stuff Sack Size: 25 x 52 cm
- Fill Power: 650
- Fill Weight: 34oz / 964g
- Comfort Temperature: 19F / -7°C
- Limit Temperature: 6°F / -15°C
- Extreme Temperature: 0°F / -18°C
Material & Construction
- Shell: Recycled polyester ripstop with water-repellent finish without intentionally added PFAS
- Lining: Recycled polyester taffeta with water-repellent finish without intentionally added PFAS
- Fill: 650 fill Downtek™ PFC-Free with bluesign® Certified water-repellent chemistry
