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  • DownTek insulation absorbs 30% less water and dries 60% faster than untreated down, and retains significantly more loft than untreated down after exposure to moisture
  • Included REM Pad Sleeve™ secures your bag to the pad so you don't roll off the pad at night; REM pad sleeve detaches and doubles as a storage sack
  • Thermally efficient vertical structured sidewalls trap heat close to your body while the contoured shape of the hood cradles your head in lofty comfort
  • Traditional mummy shape allows for light weight and increased thermal value
  • Superlight, soft-shell fabric with high tear strength and Insotect Flow construction
  • Vaulted footbox creates more wiggle room for your feet
  • Contoured hood baffles cradle your head for a comfortable fit
  • Low-profile cordlock lets you un-cinch the hood with only one hand
  • Oversized interior anti-draft collar
  • 70 in. (178cm) YKK #8 antisnag zipper with zipper garage
  • Interior fabric loops for sleeping bag liners; exterior loops for hang drying or storage
  • Includes a mesh storage sack and nylon stuff sack
  • Mate together left and right zip bags


Many sleeping bags are rated for temperature by an independent testing protocol, the European Norm (EN) 13537. Each bag gets two ratings: a comfort rating and lower limit rating. The comfort rating is the lowest temperature at which the bag will keep the average woman (or "cold sleeper") comfortable, and the lower-limit rating is the lowest temperature at which the bag will keep an average man (or “warm sleeper”) comfortable. Everyone's body and sleep comfort is different, so EN Ratings are merely a guideline to help you compare products.

View all Big Agnes Men's Sleeping Bags

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Best Use Backpacking
EN Lower Limit 16 degrees Fahrenheit
EN Comfort 28 degrees Fahrenheit
Temperature Rating (F) 20
Temperature Rating (C) -5
Long Left
2 lbs. 7 oz.
Regular Left
2 lbs. 4 oz.
Shell Ripstop nylon
Zipper Location Left
Insulation Type Down
Water-Resistant Down Yes
Fill 650-fill DownTek down
Fill Weight
Long Left
22 ounces
Regular Left
20 ounces
Lining Nylon taffeta
Sleeping Bag Shape Mummy
Fits Up To (in.)
Long Left
78 inches
Regular Left
72 inches
Shoulder Girth (in.)
Long Left
62 inches
Regular Left
60 inches
Hip Girth (in.)
Long Left
56 inches
Regular Left
54 inches
Stuff Sack Size 8 x 17.5 inches
Stuff Sack Volume 14.5 liters
Compressed Volume
Long Left
5.05 liters
Regular Left
3.71 liters
Gender Unisex
Rated 5 out of 5 by from Replaced my Lost Ranger bag I had last years model of the Big Agnes Lost Ranger bag (which is rated at 15 degrees) and honestly the extra room was nice but it did not keep me as warm! Even though this bag is a 20 degree bag - the mummy style defintley makes it feel warmer then my Lost Ranger ever was. I love that the sleeve is detachable as well and that there is some insulation on the bottom - which the Lost Ranger did not have.
Date published: 2017-05-20
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