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Thermarest Polar Ranger -20F/-30C


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The Thermarest Polar Ranger -20F/-30C is a fast and light down sleeping bag equipped to conquer the most extreme conditions known to man.

For polar expeditions and high-altitude adventures that demand un-compromised warmth, the Thermarest Polar Ranger -20F/-30C has been designed with polar explorer Eric Larsen, to ensure that every component of the bag has been maximised for warmth even in Arctic settings. The sleeping bag has been engineered with 800-fill Nikwax Hydrophobic Down and features like a synthetic snorkel hood to help you enjoy arctic expeditions. Explorers like Eric Larsen understand the severity of the arctic cold and they count on the uncompromising performance of the Polar Ranger. Storage sack and compression stuff sack included.

More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags


  • Overlapping Side Vents: Side vents open to allow arm use and customisable temperature control. Overlapping draft tubes prevent cold spots when zippers are closed.
  • Snorkel Hood: Controls frost created by breath and eliminates warmth-sapping cross drafts. Synthetic-filled snorkel resists moisture.
  • 800-fill Nikwax Hydrphobic Down: Dries three times faster than untreated down without using dangerous PFCs.
  • SynergyLink ConnectorsIntegrate the bag with a mattress for optimal comfort and efficiency; removable for versatility.
  • Responsible Down Standard Certified: Certification that ensures that the waterfowl in the down supply chain are treated humanely.
  • Additional features: Toe-asis Foot Warmer Pocket, Overstuffed draft tubes, Quilt and Blanket Loops.


Regular Long
Colour Lava Lava
Weight (Standard) 3 lbs 4 oz 3 lbs 7 oz
Weight (Metric) 1.47 kg 1.56 kg
Width (Standard) 31 in 32.5 in
Length (Standard) 80 in 85 in
Height (Standard) 6.5 in 6.5 in
Fits (Standard) 72 in 78 in
Fits (Metric) 183 cm 198 cm
Girth, Shoulder (Standard) 62 in 65 in
Girth, Shoulder (Metric) 157 cm 165 cm
Girth, Hip (Standard) 57 in 58 in
Girth, Hip (Metric) 145 cm 147 cm
Girth, Foot box (Standard) 46 in 51 in
Girth, Foot box (Metric) 117 cm 130 cm
Packed dimension (Standard) 11 in x 20 in 11 in x 20 in
Packed dimension (Metric) 28 cm x 51 cm 28 cm x 51 cm
Recommended Temperature Comfort (F) -4 -4
Recommended Temperature Comfort (C) -20 -20
Recommended Temperature Limit (F) -20 -20
Recommended Temperature Limit (C) -29 -29
Fill material 800 Fill Goose Nikwax Hydrophobic Down RDS 800 Fill Goose Nikwax Hydrophobic Down RDS
Fill weight (Standard) 2 lbs 2 oz 2 lbs 4 oz
Fill weight (Metric) 0.95 kg 1.03 kg
Shell fabric 20D Polyester Ripstop w/DWR 20D Polyester Ripstop w/DWR
Lining fabric 20D Polyester Taffeta 20D Polyester Taffeta
Zipper side Center Center

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