Big Agnes Women's Greystone 20°

Big Agnes Women's Greystone 20° Sleeping Bag

A lightweight, women's-specific mummy bag built for backpackers who want reliable three-season warmth at a value price point without compromising on the features that make a cold night comfortable. The Greystone delivers 650-fill DownTek insulation, recycled materials, and a women's-specific fit that actually accounts for how women sleep rather than just scaling down a men's bag.

Why We Carry It
It's the bag we recommend for women getting into backpacking who want a quality down bag with a women's specific fit without paying for features they're not ready to need yet.

Highlights

• 650-fill DownTek water-resistant down — A treated down that resists moisture absorption and maintains loft longer than untreated down in damp conditions. A meaningful performance advantage for shoulder season and variable weather backpacking.
• Women's specific contoured fit — Shaped to a woman's body with increased insulation in key areas for a more thermally efficient bag that actually retains heat where women need it most. A genuine fit difference over a standard mummy bag.
• Contoured hood with low-profile cordlock — Follows the shape of your head for a more comfortable, secure fit on cold nights. One-handed cinch adjustment so you can dial in the hood without fully waking up.
• Oversized no-draft collar and insulated zipper tube — Seals cold air out at the neck and along the zipper line where most bags lose heat. Two of the most common cold spots in a mummy bag addressed in one design.
• Two-way YKK anti-snag zipper with Zipper Garage — Opens from either end for ventilation on warmer nights without a full unzip. The anti-snag locking zipper runs smoothly without catching on the lining and the Zipper Garage protects the end when not in use.
• Recycled shell and lining fabrics — Sustainable material sourcing in a bag at this price point. A meaningful environmental choice backed by material selection rather than marketing language.
• 2 lb 7 oz total weight at 22 oz fill — A competitive weight for a 20-degree women's down bag. Light enough to justify on any backpacking trip where warmth and pack weight are both being evaluated.
• Compresses to 7.5 x 8.5 inches — A compact compressed size that fits in a standard backpacking stuff sack without taking over the bottom of your pack.
• Interior liner loops and exterior hang loops — Add a liner for extra warmth on colder nights and hang dry or store properly without damaging the down fill.
• Mates with left-zip All-Gender bags — Zip two bags together to share warmth with a tent partner.

Best for

Women backpackers looking for a reliable, lightweight three-season down bag with a genuine women's specific fit for temperatures down to 20 degrees. A strong value entry point into quality down sleeping bags for anyone getting into backpacking or looking to upgrade from a synthetic or low-fill alternative.

Fit Note

Regular fits up to 5'6" with a 55-inch shoulder girth and 53-inch hip girth. Long version available for up to 6'. Right-zip configuration. Works with any pad size or style.