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Polar Ranger Sleeping Bag: -20F Down

4.3077 out of 5 stars
13 Reviews

Out of Stock

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A bear of a bag.

Whether you're using your campsite as a basecamp for alpine touring or backpacking through a winter wonderland, the nights get cold. Sleep in the Therm-a-Rest Polar Ranger -20 Degree Down Sleeping Bag for a cozy refuge when you're ready to get off of your feet. The 800-fill down lofts when you pull it out of its compression sack, and the Nikwax treatment helps it resist compressing when you expose it to moisture. Features like the side vents that allow you to use your hands and the synthetic-filled snorkel hood that keeps your face warm without trapping in the moisture from your breath optimize this bag for extreme conditions—whether you're riding them out while sleeping or enjoying a sunrise drink.


  • Sleeping bag for backpacking in cold conditions
  • 800-fill down lofts to maximize warmth retention
  • Nikwax treatment resists moisture-based compression
  • Synthetic-filled, snorkel hood manages frost from breath
  • Side vents open to allow arm use or airflow
  • Draft tubes block gusts from all the zippers
  • Toe-asis adds extra insulation to warm your feet
  • Item #CAS00DO
[face fabric] 20D polyester ripstop, DWR, [lining] ThermaCapture (20D polyester taffeta)
800-fill goose Nikwax Hydrophobic down
Max User Height
[regular] 72in, [long] 78in
Shoulder Circumference
[regular] 62in, [long] 65in
Hip Circumference
[regular] 57in, [long] 58in
Foot Circumference
[regular] 46in, [long] 51in
Bag Length
[regular] 80in, [long] 85in
Toe-asis foot warmer
Pad Retainer
2 zippered side
Fill Weight
[regular] 2lb 2oz, [long] 2lb 4oz
Storage Sack
Stuff Sack
Stuff Size
11 x 20in
Claimed Weight
[regular] 3lb 3oz, [long] 3lb 7oz
Manufacturer Warranty