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Klymit Inertia XL Inflatable Sleeping Mat

ASTM R-Value: Not Quoted / Dimensions: 198 x 63.5 x 3.8cm / Packed Size: 10 x 20cm
Weighs 500g (excluding bag)
Code: SS191002
  • £74.99
  • (FREE Delivery on orders over £15)
+ In Stock Now | Usually dispatched within 24 hours

With even more cushioning for a great nights sleep, the Inertia XL is light and comfortable. A great piece of kit for the weight conscious who still want a little bit of luxury.

Klymit says:

The lightest, most packable oversized air pad available. Weighing in at just over one pound, the Inertia XL™ is extra wide and extra long for those who value comfort, but still packs down to the size of a soda can. Utilizing our V-Chamber technology, the Inertia XL™ includes a customizable pressure valve with hand-pump, and also features ultra-durable fabric for rugged use.

Klymit's Inertia XL Inflatable Sleeping Mat is not only built for bigger people but offers a lot more support and comfort than the standard X Frame mat. The penalty is, of course, added weight but it's still one of the lightest oversized mats around.

The Klymit design provides extra cushioning down each side of the mat making it easier to stay on the mat during the night an adding comfort. The main design feature of the Inertia is the loft pockets, or gaps where it allows your sleeping bag to loft and saves weight. This design isn't for everyone and it does reduce the r-value of the mat significantly but it is still amazingly comfortable.

It is really easy to inflate, comes with a hand pump and repair kit making it a great companion for multi day adventures.

- Reviewed by Ultralight Outdoor Gear

Help and advice:
  • Minimalist Design: Advanced patterning removes all extraneous material to creates an ultralight, minimalist design that delivers comfort and support for only 14.1 oz. and packs to 4” x 8”.
  • Body Mapping: Advanced patterning places chambers only where padding is needed and eliminates them where they are not, allowing us to shed significant weight without sacrificing comfort.
  • Loft Pockets: Empty spaces between the chambers serve as expansion zones that allow your sleeping bag to fully loft beneath you, maximizing its thermal performance.
  • The Right Size: At 78” long, the streamlined size is tapered to fit the body and allows the pad to be used inside or outside of your sleeping bag.
  • Inflation and Deflation: Pad rapidly inflates in as few as 5-7 breaths, and a hand pump is included for more rapid inflation and the ability to reach a higher PSI. The valve’s intelligent design allows for micro adjustments to fine tune pressure and comfort.
  • Patch Kit included for emergency repairs
  • Weight: 500g (excludes storage bag)
  • Dimensions: 78" x 25" x 1.5" / 198.1 cm x 63.5 cm x 3.8 cm
  • ASTM R-Value: Not quoted
  • Inflation: 5-7 Breaths
  • Packed Size: 4" x 8" / 10.2 cm x 20.3 cm
  • Fabric: 75D Polyester
  • Warranty: Klymit Lifetime Warranty

ASTM R-Value:

From 2020, there is a new industry standard for measuring the R-value (level of insulation) of sleeping mats – ASTM F3340-18. This new standard is the sleeping mat equivalent to the EN rating for sleeping bags.

You can now directly compare the R-value of mats rated using the ASTM F3340-18 with confidence that is a fair and accurate comparison between mats. In simple terms, the higher the R-value, the warmer the mat.

In general terms, an R-value below 2.0 is for summer use, 2.0 to 4.0 is for cooler 3 season use and 4.0+ is for winter temperatures. This will be also be dependent on your sleeping bag, how cold you sleep etc. Please contact our customer service team if you need advice on choosing the right mat for your activity.

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