Demo Katherine SL 20 Regular, Right Zip

Big Agnes

  • $75.00
  • Save $75

Regular, Right Zip


  • Traditional mummy shape reduces weight and increases thermal value
  • Nylon shell fabric with a durable water repellent (DWR) finish and minimal exterior stitching sloughs off light moisture
  • 80% recycled PrimaLoft® Black Hi-Loft Ultra insulation provides downlike warmth, loft and compressibility
  • Accordionlike construction maintains the insulation's vertical loft while keeping heat trapped against the body
  • Oversized interior provides wiggle room; vaulted footbox provides additional loft and warmth
  • Low-profile cordlock lets you un-cinch the hood with just one hand
  • Layered offset quilting on bottom prevents cold spots and remains soft and resilient even after sustained compression
  • Interior fabric loops for sleeping bag liners; exterior loops for hang drying or storage
  • 70 in. (178 cm) YKK #5 antisnag locking zipper
  • No-draft tube along the zipper and no-draft collar prevents heat loss
  • Mesh storage sack and nylon stuff sack included
  • Part of the 1101 Collection inspired by the iconic Continental Divide Trail (CDT), a 3,000 mi. trail from Canada to Mexico that traverses 5 states and tops out at 14,000 ft.
  • Big Agnes will donate a portion of 1101 Collection sales to the Continental Divide Trail Coalition


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.

Technical specs

Best Use
Tested Lower Limit
Tested Comfort
Temperature Rating (F)
20 degrees (F)
Temperature Rating (C)
-5 degrees (C)
Petite - Right Zip: 3 lbs.
Regular - Right Zip: 3 lbs. 8 oz.
Zipper Location
Insulation Type
PrimaLoft Black Hi-Loft Ultra (80% recycled)
Fill Weight
Petite - Right Zip: 37 ounces
Regular - Right Zip: 39 ounces
Nylon taffeta
Sleeping Bag Shape
Fits Up To (in.)
Petite - Right Zip: 65 inches
Regular - Right Zip: 70 inches
Shoulder Girth (in.)
Petite - Right Zip: 54 inches
Regular - Right Zip: 56 inches
Hip Girth (in.)
Petite - Right Zip: 54 inches
Regular - Right Zip: 56 inches
Stuff Sack Size
9 x 20 inches
Stuff Sack Volume
20.9 liters
Compressed Volume
Petite - Right Zip: 8.4 liters
Regular - Right Zip: 11.6 liters
Contains recycled materials