Exped SynMat HL M Regular Sleeping Mat

ASTM R-Value: 2.9 / Dimensions: 183 x 52 x 7cm / Packed Size: 19 x 9cm
Weighs 365g (excluding bag)
Code: SS17317
  • £134.99
  • (FREE Delivery on orders over £15)
  • RRP £149.99
+ In Stock Now | Usually dispatched within 24 hours

The Synmat HL is a good choice if you are looking for a comfortable, general purpose mat that's lightweight with suitable insulation for 3+ season use. They offer everything most backpackers require in a sleeping mat at a very low weight - it sets the standard.

Exped says: The SynMat HL is the world’s lightest mat at its warmth and comfort levels! It packs to an extremely small size and it's tapered profile fits into the smallest tents. Tapered design and 20 denier fabric for weight reduction, microfiber insulation for 3-season warmth and 7cm thickness for comfort. This mat proves that comfort and warmth need not be sacrifice in pursuit of super light packing.

Next-to-skin comfort and anti-slip GripSkin honeycomb-pattern coating. Laminate is air tight and impervious to hydrolysis. 

Clever Pumpsack included: The Schnozzel Pumpbag allows you to inflate the mat instantly while preventing humidity from your breath affecting the insulation. It also doubles as an ultra lightweight compression stuffsack.

Exped's SynMat HL M Regular Sleeping Mat is an insulated airbed. Airbeds are easily the most comfortable camping mats available and its only in recent years that they have been made light enough for backpackers, airbeds with insulation go a step further and keep you warmer - this enhances the performance of your sleeping bag and in my view is well worth the extra weight though you need to match the quality of insulation to the conditions you are likely to encounter.

Exped rates the Synmat HL for use in temperatures down to minus 6C - of course it can be used in much lower temperatures but Exped are saying there are better products for colder conditions - but minus 6C is quite cold, and probably identifies this mat as 3+ season.

Weight and pack size are extremely good, the Synmat UL is 7cm thick so it will match the comfort of most of the Exped range and it has slightly enlarge baffles along each side to help keep you centred on the mat. Its a mummy shaped mat - the very lightest mats are mummy shaped to save weight, some people prefer rectangular mats because they are easier to stay on.

There's a single valve for inflation and deflation which minimises weight. The Synmat HL is a good choice if you are looking for a comfortable, general purpose, but lightweight mat.

- Reviewed by Ultralight Outdoor Gear


Read reviews here:

Help and advice:
  • The lightest, most compact insulated sleeping mat
  • Extremely lightweight with high R Value
  • Super comfortable
  • Anti-slip GripSkin coating
  • Ingenious contour shape, 2 mats fit next to each other in confined space
  • Smallest packed size
  • Schnozzel Pumpbag included
  • 2 year warranty
  • Mat weighs: 365g
  • Pump weighs: 60g
  • Temperature rating: -3 °C
  • ASTM R-Value: 2.9
  • Old R-Value test (EMPA): 0.58 (SI), 3.3 (US)
  • Thickness: 7cm
  • Length: 183cm
  • Shoulder width: 52cm
  • Foot width: 35cm
  • Packed size: 19 x 9cm

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.


  • Top: 20 D Polyester, TPU polyether film laminate, hydrolysis resistant, Honeycomb Gripskin coated, Oeko-Tex 100 certified
  • Bottom: 20 D Polyester, TPU polyether film laminate, Hydrolysis resistant, Oeko-Tex 100 certified
  • Insulation: 60 g/m² Texpedloft Microfibre, Bluesign certified


Showing 2 of our total 3 reviews, with an average rating of 5 stars. Read all 3 reviews for Exped SynMat HL M Regular Sleeping Mat.
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Review Summary - 5 out of 5 based on 3 ratings.
February 23, 2019 | Alan Trevarton
Great so far

I have been using a TAR Neo Air, which is a good mat except I keep slipping off it and waking up on cold ground! The Exped has a nice soft grippy topping, which should avoid this I hope. The schnozzle inflating bag works really well (better than the Neo air pump bag) and the combined weight is 20g lower if I discard the unnecessary small stuff sack. Looking forward to a field trial soon. I will use the schnozzle bag for stashing my pillow and sleeping bag too, more grams saved.

Ultralight Outdoor Gear Limited
August 15, 2018 | Woody
Stands the test of time

I'd agree with the other review and add that I've slept at least 150 nights on my exped and it's still as good as new. At one stage pump sack split but was an easy repair. It doesn't sound like a crisp packet when you move. Takes literally 20 seconds to inflate using schnozel

Ultralight Outdoor Gear Limited