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A warm and dependable down sleeping bag suited to colder three-season and winter conditions
Big Agnes says:
Ideal for backpacking but versatile enough for couch surfing, the Greystone is insulated with 650 Downtek™ PFC-Free, uses baffle construction for efficient heat distribution, and includes a water-resistant coating to keep you dry. If you’re in the market for a high quality, lightweight mummy shaped bag that packs small and keeps you toasty in the backcountry, the Greystone is your ticket to getting out there in comfort!
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
- Delivers technical, lightweight performance with high thermal value, compressibility, and comfort
- 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
- Mate together left (All-Gender) and right (Women’s) zip bags to share warmth with your tent mate
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: 38°F / 4°C
- Limit Temperature: 29°F / -2°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
