Demo Mirror Lake - Regular, Right Zip

Demo Mirror Lake - Regular, Right Zip

Big Agnes

  • $125.97
  • Save $83


  • Women-specific bag features a combination of increased insulation and an anatomically contoured fit
  • Traditional mummy shape, DownTek™ down insulation and baffle construction provide efficient heat retention
  • 600-fill-power DownTek water-repellent down is bluesign® certified and PFC-free
  • Contoured hood follows the shape of your head for a more comfortable fit; low-profile cordlock lets you uncinch the hood with one hand
  • Breathable shell fabric features a water-repellent finish
  • 2-way YKK® #5 antisnag locking zipper with zipper garage offers a smooth, quick zip
  • Liner loops let you attach a sleeping bag liner and help keep it in place (liner not included)
  • Designed to zip together with left-zip bags (not included)
  • No-draft oversize collar and no-draft zipper help seal out cold air
  • Exterior loops for hang drying or storage
  • Works with any pad size or style (sold separately)
  • Comes with mesh storage sack and nylon stuff sack
  • A note from Big Agnes: A misprinting on the stuff sack indicates the wrong temperature rating; if you receive a misprinted item, know that this product is EN rated to 22L


Many sleeping bags are rated for temperature by an independent testing protocol. With both European Norm (EN) 13537 and International Organization for Standardization (ISO) 23537 testing, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort/T-Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit/T-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 hat, sleeping on a single 1 in. thick insulating pad. Many brands use the Comfort rating for women's bags and the Lower rating for men's and unisex bags. Everyone's body and sleep comfort differ, so EN and ISO ratings are simply a guideline to help you compare products.

Technical specs

Best Use
Tested Lower Limit
10 degrees (F) - EN
Tested Comfort
22 degrees (F) - EN
Temperature Rating (F)
22 degrees (F)
Temperature Rating (C)
-7 degrees (C)
Petite - Right Zip: 2 lbs. 6 oz.
Ripstop nylon
Zipper Location
Insulation Type
Water-Resistant Down
600-fill-power DownTek down
Fill Weight
Petite - Right Zip: 1 lb. 6 oz.
Nylon taffeta
Sleeping Bag Shape
Fits Up To (in.)
Petite - Right Zip: 65 inches
Shoulder Girth (in.)
Petite - Right Zip: 54 inches
Hip Girth (in.)
Petite - Right Zip: 54 inches
Stuff Sack Size
8 x 17.5 inches
Stuff Sack Volume
14.4 liters
Compressed Volume
Petite - Right Zip: 7.4 liters
Contains materials that meet the bluesign® criteria, Down certified to the Responsible Down Standard (RDS)