Big Agnes Greystone 20 Sleeping Bag - Women's

Color: Pale Purple
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Ideal for backpacking but versatile enough for couch surfing, the women's Big Agnes Greystone 20 sleeping bag is insulated with DownTek™ down and uses a baffle construction for superb warmth.


  • Women's mummy bags have a combination of increased insulation and a fit that is shaped to contour to a woman's body, creating an efficient, warm sleeping bag for women
  • 600-fill-power DownTek down repels water while maintaining its insulating value
  • Shell and lining fabrics feature a PFC-free water-repellent finish
  • Traditional mummy shape allows for a light weight and increased thermal value
  • Contoured hood follows the shape of your head for a more comfortable fit
  • Low-profile cordlock lets you uncinch the hood with one hand
  • Insulated tube along upper hood opening, oversize interior anti-draft collar and no-draft zipper garage work together to seal out drafts
  • Anti-snag zipper enables a smooth, quick zip; 2-way zipper
  • Includes liner loops for attaching a sleeping bag liner (not included)
  • Mate together left and right zip bags
  • Exterior loops let you hang the bag up to dry or for storage
  • Includes a storage sack and stuff sack


Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.

Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Big Agnes Backpacking Sleeping Bags

Technical Specs

Best Use


Tested Lower Limit

10 degrees (F) - ISO

Tested Comfort

23 degrees (F) - ISO

Temperature Rating (F)

23 degrees (F)

Temperature Rating (C)

-5 degrees (C)


Regular - Right Zip: 2 lbs. 5 oz.

Long - Right Zip: 2 lbs. 9oz.


Recycled 20-denier 400T polyester ripstop with PFAS-free water-repellent finish

Zipper Location


Insulation Type


Water-Resistant Down



600-fill-power DownTek down

Fill Weight

Regular - Right Zip: 1 lb. 6 oz.

Long - Right Zip: 1 lb. 8 oz.


Recycled 20-denier 380T polyester taffeta with PFAS-free water-repellent finish

Sleeping Bag Shape


Fits Up To (in.)

Regular - Right Zip: 66 inches

Long - Right Zip: 72 inches

Shoulder Girth (in.)

Regular - Right Zip: 54 inches

Long - Right Zip: 57 inches

Hip Girth (in.)

Regular - Right Zip: 53 inches

Long - Right Zip: 56 inches

Stuff Sack Size

9 x 20 inches

Stuff Sack Volume

20.8 liters

Compressed Volume

Regular - Right Zip: 6.2 liters

Long - Right Zip: 7.4 liters




Contains recycled materials

Down certified to the Responsible Down Standard (RDS)

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