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Therm-a-Rest Offers Full Sleep Systems for 4-Season Campers

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Proprietary technologies and years of experience are keeping cold weather campers comfortable and outdoors for longer

SEATTLE, WA (January 6, 2016)Good sleep equals a better, safer day outside. The body works overtime in cold, winter conditions, and staying warm while sleeping is essential to conserving crucial energy adventurers need during the day. Therm-a-Rest® has been keeping campers warm and comfortable at night since 1971, from the summit of Mt. Rainier to the icy reaches of the North and South Pole. With over 45 years of experience, Therm-a-Rest has built some of the warmest and lightest winter sleep systems on the market, from the NeoAir® XTherm™ and RidgeRest® Solar mattresses, to the Altair™ HD and Adara™ HD down sleeping bags. 


No sleep system is complete without a mattress. Take it from polar-explorer Eric Larsen, who leads expeditions to some of the coldest environments on earth: maintaining a safe and comfortable temperature at night is key to survival. For winter campers in need of a warm and indestructible mattress, the RidgeRest® Solar is Larsen’s tested and trusted sleep system of choice. The mattress is made with a lightweight, closed-cell foam for unmatched durability on any surface and Therm-a-Rest’s proprietary ThermaCapture™ radiant heat technology amplifies warmth by 20%. Lighter weight closed-celled options include the Z Lite Sol™ for thru-hikers counting ounces, as well as the Z Seat™ for quick rests during epic days of backcountry skiing.

“Therm-a-Rest products have always been an integral part of my adventures,” says Larsen. “I’ve taken my RidgeRest to both poles and up Everest – it’s sturdy as hell and lasts forever.”

When lightweight is of the utmost importance, experienced long-distance and extreme winter travelers choose the NeoAir® XTherm™. With an R-Value of 5.7, a weight of only 430 grams (15 oz.), and a loft of 6 centimeters (2.5 in.) once fully inflated, this is one of the lightest and warmest mattresses available on the market. ThermaCapture traps the heat while Therm-a-Rest’s Triangular Core Matrix™ design minimizes convective heat loss, allowing for a fully capable 4-season mattress that packs down to the size of a one-liter water bottle. New for 2015 is the NeoAir® XTherm™ MAX,offering all the benefits of the original XTherm in a full rectangular shape, providing more surface area for the broader or restless sleeper. 

Sleeping Bags:

Therm-a-Rest’s down and synthetic 4-season sleeping bags offer comfort and warmth while resting during the coldest months of the year to conserve the energy you’ll need during the day. The Altair™ HD and women’s-specific Adara™ HD are designed with zoned insulation and 750+ fill Nixwax® Hydrophobic Down is placed where it’s needed most to avoid teeth-chattering nights. ThermaCapture technology ensures further warmth by reflecting the sleeper’s body warmth right back at them with no added weight. The synthetic Centari™ uses similar zone insulation with shingled eraLoft™ in place of down. Further bag details include cinchable hoods and a heat-trapping draft collar and full-length zipper draft tube to ensure cold air stays out and warmth is trapped inside where it’s needed.

All 4-season camping bags and mattresses are available online for purchase at

About Therm-a-Rest®

Seattle-based Therm-a-Rest has been the market leader in premium outdoor comfort since its invention of the world’s first self-inflating mattress in 1972. A commitment to providing inventive, long-lasting and reliable mattresses, sleeping bags, blankets, and camp furniture solutions that reinvent the way people live outdoors. All Therm-a-Rest mattresses are made in the Seattle, U.S.A. and Cork, Ireland manufacturing facilities. For more information, visit