Big Agnes  Anthracite 20 Sleeping Bag - Women's

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Stay cozy in the women's Big Agnes Anthracite 20, a mummy-style sleeping bag that's light enough to stuff in your pack for summer backpacking but comfy enough for backyard campouts with the kids.


  • This women-specific bag differs in shape and fill weight with a less drastic taper from shoulders to hips to feet—reducing cold spots and creating more warmth where it counts
  • Lightweight, increased thermal value with traditional mummy shape—designed to contour to your figure for the most thermally efficient and comfortable night's sleep
  • Recycled ripstop shell fabric and lining feature a PFC-free water-repellent finish
  • Fireline™ PRO Eco Recycled synthetic insulation is made with multidenier, short-staple fibers with high loft to efficiently trap heat
  • Comfortable hood contours to the shape of your face for a snug fit
  • Low-profile cordlock lets you uncinch the hood with one hand
  • Insulated tube along upper hood opening seals out drafts when cinched
  • Antisnag, 2-way zipper with zipper garage offers a smooth, quick zip
  • No-draft collar and no-draft zipper
  • Interior fabric loops let you secure a sleeping bag liner (liner not included)
  • Exterior loops for hang drying or storage
  • Mate together left and right zip bags (additional sleeping bag not included)
  • Stuff sack included


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

Item #216104
Best Use


Tested Lower Limit

14 degrees (F) - ISO

Tested Comfort

25 degrees (F) - ISO

Temperature Rating (F)

20 degrees (F)

Temperature Rating (C)

-7 degrees (C)


Regular - Right Zip: 3 lbs. 1 oz.

Long - Right Zip: 3 lbs. 9 oz.


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

Zipper Location


Insulation Type



Fireline PRO Eco recycled synthetic fibers

Fill Weight

Regular - Right Zip: 2 lbs. 5 oz.

Long - Right Zip: 2 lbs. 10 oz.


Recycled 50-denier 300T polyester pongee

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

10 x 21 inches

Stuff Sack Volume

27 liters

Compressed Volume

Regular - Right Zip: 11 liters

Long - Right Zip: 11.4 liters




Contains recycled materials

4 reviews with an average rating of 3.8 out of 5 stars

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