Sea to Summit Ether Light XT Insulated Sleeping Mat - Regular

ASTM R-Value: 3.2 / Dimensions: 183 x 55 x 10cm / Packed Size: 11 x 24cm
Weighs 488g (excluding bag)
Code: SS20616
  • £164.99
  • (FREE Delivery on orders over £15)
  • RRP £174.99
Item out of Stock | Usually dispatched within 24 hours

The Ether Light XT insulated mat provides exceptional comfort and warmth in a very light package.

Sea to Summit says:

Our lightest and thickest full size Air Sprung Cell™ Mat with insulation for all-season comfort.

Refining lightweight cold-climate sleeping comfort, this mat combines a lightweight 30/40D Nylon fabric, Exkin Platinum® and THERMOLITE® insualtion with a loop baffle Air Sprung Cell™ construction to create a 10cm thick mat with an incredibly low weight. Larger air pockets are created by using many looped TPU baffles which connect the top and bottom fabric layers with our Air Sprung Cell™ dot weld pattern. The looped baffles allow the top and bottom layers to be positioned further apart creating larger pockets of air when inflated that require less fabric overall. Perfect for side sleepers, the extra height of this mat lets hips sink deeper into it without touching the ground.

The Sea to Summit's Ether Light XT Insulated Sleeping Mat impresses straight out of the box. It was straightforward to inflate with the the well thought out integrated stuff and pump sack. I found it surprisingly easy to roll up and fit into the stuff sack something I cannot say of some other inflatable mats.

The depth of the mat sets it apart from its competitors providing extra comfort and keeping you further away from the cold ground whichever way you sleep. The outer fabric is tough and grippy so the mat will stay where you want it.

- Reviewed by Ultralight Outdoor Gear

Read reviews here:

Help and advice:
  • eXtra Thick (XT) loop baffle Air Sprung Cells™ 
  • Lightweight, quiet and grippy 30/40D Nylon fabric,  field repairable with included self-adhesive patches
  • Exkin Platinum® and THERMOLITE® for insulation
  • Air Sprung Cells™ for a more comfortable sleep
  • Ultra-Fresh® anti-microbial treatment to the TPU formula to  prevent internal mould growth
  • Pillow Lock™ attaches an Aeros™ pillow to mat
  • Multi-functional, high flow-rate valve
  • Weighs: 488g (excludes bag/pumpsack)
  • Airstream pumpsack/storage bag weighs: 56g
  • Dimensions: 183 x 55 x 10cm
  • Packed Size: 11 x 24cm
  • ASTM R-Value: 3.2

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.

Showing our 2 Sea to Summit Ether Light XT Insulated Sleeping Mat - Regular reviews with an average rating of Excellent. Would you like to write a review?
Review Summary - 5 out of 5 based on 2 ratings.
April 28, 2020 | Mosschops
quiet and comfy

This mat is very quiet, it makes no more noise than my sleeping bag and is really comfy to side sleep on. Three season use is pushing it IMHO unless you use a cell foam mat as well but it is light and packs small enough to pop in my pack, but the best bit is that its super fast and easy to inflate without any extra paraphernalia.

Ultralight Outdoor Gear Limited
March 2, 2020 | Tom - UOG
Super Comfy

So comfy and stable. I wriggle around a lot from my back to my side to my front. The Ether Light XT Insulated Mat didn't move or squeak and was always comfortable. The weight and pack size is impressive given the warmth and depth of the mat.

Ultralight Outdoor Gear Limited