Mountain Hardwear Shasta 15 Sleeping Bag - Women's

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Optimize your 3-season comfort while camping in the cold with the women's Mountain Hardwear Shasta 15 sleeping bag, which features additional Thermal.Q recycled insulation to concentrate warmth.


  • 20-denier ripstop polyester shell offers lightweight performance and durability
  • Thermal.Q insulation (80% recycled) has outstanding compressibility, maintains excellent loft and continues to insulate even when damp
  • Women-specific design features added insulation for increased overnight comfort
  • Performance Plus mummy cut provides efficient warmth and comfort throughout
  • Narrow, contoured foot box follows the natural foot position for maximum warmth and comfort
  • Lightweight #5 YKK® 2-way zipper with antisnag slider allows for easy entry and exit, and lets you ventilate with ease
  • Full-length insulated draft tube prevents heat loss and cold spots at the zipper
  • Shaped draft collar and insulated hood with adjustable face gasket trap the warmth inside and keep cold air out
  • Internal stash pocket stores essentials close by and keeps items that are vulnerable to the cold warm inside the bag
  • Includes a compression sack and mesh storage bag for convenient, compact packing
  • Zip together left-zip and right-zip Mountain Hardwear bags to make a double sleeping bag (additional bags not included)


Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. 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. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
View the Mountain Hardwear Shasta Product LineView all Mountain Hardwear Backpacking Sleeping Bags

Technical Specs

Best Use


Tested Lower Limit

5 degrees (F) - ISO

Tested Comfort

17 degrees (F) - ISO

Temperature Rating (F)

17 degrees (F)

Temperature Rating (C)

-8 degrees (C)


20-denier ripstop polyester

Zipper Location


Insulation Type



Thermal.Q: 80% recycled polyester/20% polyester


20-denier ripstop polyester

Sleeping Bag Shape


Stuff Sack Size

9.5 x 18 inches




Contains recycled materials

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