Ether Light XT Extreme Insulated Air Sleeping Mat (Regular)
BEST USE: Winter Camping, Mountaineering, Cold Weather Backpacking
WEIGHT: 19.8oz | 560g
PACKED SIZE: 8.3 x 4.7 x 4.7in | 21 x 12 x 12cm
ASTM TESTED R-VALUE: 7.4
- ThermalCore insulation consists of multiple TRM layers that are quiet and reflect back infrared energy to the sleeper for increased insulation
- Four-season capable, with an ASTM-tested R-Value of 7.4
- 25% lighter weight and half the packed size compared to prior models
An evolution of the renowned Ether Light mats has arrived with the XR Pro. Staying true to their comfort and durability, the XR Pro boasts ThermalCore technology which increases insulation value while keeping weight and packed volumeto a minimum. Air Sprung Cell construction provides 10cm of plush comfort wherever you sleep. Inflation and deflation are a breeze with the XPRESS valve and Airstream pump built into the stuff sack. With double the weld strength of previous models the XR Pro is perfect for alpine adventurers, cold-weather hunters to winter campers. Outdoor winter sleep never felt this good.

DESCRIPTION
The Ether Light XT Extreme is extra thick and exceptionally warm. The XT Air Sprung Cells provide four inches of stability and comfort, while dual-density layers of THERMOLITE® insulation prevent convective heat loss and internal air movement. This results in true four-season performance.
Features
- 6.2 R-Value is perfect for cold weather adventures.
- At four inches thick, Ether Light XT Air Sprung Cells provides a plush sleeping experience.
- Dual-density layers of Thermolite® insulation fill the inner space, preventing heat loss due to convection and internal air movement.
- Lighter, quieter and durable 30D/40D face fabric with Sea to Summit’s liquid-extruded lamination is extremely reliable.
- Quick and easy inflation, deflation and adjustment is made possible by our multi-function valve and supplied Airstream Pump/stuff sack.
- Anti-microbial treatment added to the TPU lamination formula prevents internal mold growth.
- PillowLock system prevents your Sea to Summit Aeros Pillow from slipping.
- Comes with a stuff sack which doubles as a pump, a repair kit with six self-adhesive patches and a spare valve insert.
TECH SPECS
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Best UseCold Weather Backpacking
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Comes WithStuff sack w/ integrated pump, repair kit & Pillow Lock
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FabricDurable 30D/40D nylon
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R-Value6.2
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Season Rating4 Season
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SpecialAnti-microbial liquid-extruded TPU lamination to reduce delamination
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Thickness4 in / 10 cm
Regular | Large | Rec. Reg Wide | Rec. Large | |
---|---|---|---|---|
Dimensions | 183 x 55cm | 198 x 64cm | 183 x 64cm | 201 x 64cm |
Packed Size | 17.5 x 24cm | 18.5 x 28cm | 18.5 x 28cm | 18.5 x 28cm |
Stuff/ Pump Sack Weight | 62 g | 65 g | 65 g | 65 g |
Weight | 720g | 950g | 950g | 1050g |
TECHNICAL FEATURES




Frequently Asked questions
Is this sleeping pad comfortable at this thickness?
Yes. Thickness isn't the key factor for sleeping pad comfort – the number of points of suspension is. Our air sprung cell sleeping pads support your body weight with hundreds of individually air-filled springs.
Is this sleeping pad easy to inflate?
Yes! The supplied stuff sack features an integrated Airstream Pump which will quickly and easily inflate the sleeping pad. This means no hard work and dizziness for you, and practically no condensation moisture inside the pad.
Does the sleeping pad make noise when I shift around in my sleep?
No. The reflective material (Exkin Platinum®) and the outer laminate material are both very quiet. Your tent buddy will thank you in the morning.
Is the Ether Light XT Extreme Insulated Sleeping Pad warm enough for winter conditions and four-season use?
Absolutely. The tested R-Value of 6.2 of this sleeping pad and lack of internal air movement (which reduces heat loss) makes it perfect for colder temps and four-season use.
