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Press Releases

Polar Expeditions Just Got Warmer with Therm-a-Rest’s new Polar Ranger -20F/-30C Sleeping Bag

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Therm-a-Rest Ambassador Eric Larsen Influences Brand to Outfit the Extreme

SEATTLE, WA (June 27, 2017) — Seattle-based Therm-a-Rest has been helping extreme mountain athletes and explorers stay warm and comfortable at camp for decades. In 2018, Therm-a-Rest introduces a sleeping bag built to endure the coldest destinations known to man.

Designed with polar explorer and mountaineer, Eric Larsen, the Polar Ranger™ -20F/-30C is the only bag you’ll need when going to sub-zero temps. Using 800-fill Nikwax Hydrophobic Down and ThermaCapture heat-trapping technology throughout the entire bag, the Polar Ranger is equipped with every essential you need for extreme-cold camping. Touches like overlapping draft tubes, side vents and a unique synthetic snorkel hood designed to funnel air in a way that keeps condensation from chilling your face, are just a few ways the Polar Ranger keeps you warm and secure at frigid camps.

“On an expedition, aside from polar bears, my primary worry at night is warmth,” said Therm-a-Rest ambassador, Eric Larsen. “Having the right sleep system can mean life or death. Working with Therm-a-Rest to create the Polar Ranger meant years of their trusted technologies mixed with my polar expedition experience to create the best new negative-degree bag on the market.” Hear more from Eric Larsen on his experience with the Polar Ranger by following this link.

The new extreme-weather sleeping bag weighs in at 3 lbs 3 oz in the regular size. Further features include top-zip entry, quilt and blanket loops for extra layering, SynergyLink™ connectors to integrate bag to mattress, and a Toe-asis™ foot warmer pocket. Step inside the new Polar Ranger -20F/-30C yourself at the OutDOOR Trade Show in Friedrichshafen this June and the Outdoor Retailer Summer Trade Show in Salt Lake City this July.

Polar Ranger™ -20F/-30C Sleeping Bag


Designed with polar explorer Eric Larsen, the brand-new Polar Ranger is equipped to handle the most extreme conditions known to man. Whether you are on a seven-summit climb or polar ice field, every element of this bag is designed to keep you safe and secure through the worst winter storms. MSRP $699.95-$719.95

Overlapping Side Vents: Side vents open to allow arm use and customizable 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 snorkel resists moisture.

[800 Fill Nikwax Hydrophobic Down™: Dries 3 times faster than untreated down without using dangerous PFCs.

SynergyLink™ Connectors: Integrate the bag with a mattress for optimal comfort and efficiency; removable for versatility.

ThermaCapture™ Lining: Full-coverage lining traps radiant body heat and retains warmth without adding bulk or weight.

Additional features: Toe-asis™ Foot Warmer Pocket, Overstuffed draft tubes, Quilt and Blanket Loops.

Weight: Regular – 1459 g (3 lbs 3 oz); Long – 1549 g (3 lbs 7 oz)

Recommended Temperatures: Comfort – -4°F/-20° C; Limit – -20°F/-30°C

About Therm-a-Rest

Seattle-based Therm-a-Rest has been the market leader in premium outdoor comfort since inventing the world’s first self-inflating mattress in 1972. For people who explore the outdoors, Therm-a-Rest mattresses, sleeping bags, tents and camp furniture provide the perfect way to rest and recharge for any adventure. The majority of Therm-a-Rest gear is made in our Seattle, WA, Reno, NV and Cork, Ireland manufacturing facilities. For more information, visit