Big Agnes Greystone
Best sustainable mummy bag for eco-conscious backpackers and casual campers.
A reliable, eco-conscious choice for cold-weather camping that balances warmth with sustainable materials. It offers a classic mummy fit and treated down insulation, making it a versatile performer for both backcountry treks and casual trips.
$269.95
In stock
at
River Rock Outfitter
Who it's for
- Backpackers camping in humid or unpredictable wet climates
- Restless sleepers who frequently roll off their pads
- Eco-conscious campers seeking value without sacrificing performance
Who should skip it
- Ultralight hikers prioritizing minimal pack weight and volume
- Campers who prefer not to purchase additional gear
- Long-term users wanting gear that lasts many seasons
Performance breakdown
Thermal Efficiency
DownTek insulation traps heat effectively for reliable three-season warmth.
Moisture Resistance
Water-resistant coating handles damp conditions well without sacrificing breathability.
Packability
600-fill power offers decent compression for standard backpacking setups.
Sustainability
Recycled shell and lining materials significantly reduce the environmental footprint.
Mummy Ergonomics
Contoured shape balances heat retention with enough room to shift comfortably.
Weight-to-Warmth Ratio
Strikes a practical balance for weight-conscious hikers and casual campers alike.
Key Specs
Temperature Rating
20° Fahrenheit
Sleeping Bag Shape
Mummy
Insulation Type
600 fill DownTek™ insulation
Shell Material
Recycled fabrics
Lining Material
Recycled fabrics
Water Resistant
Yes, water-resistant coating
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