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Thermarest Evolite

A unique combination of what is basically an airmat with a self inflating foam skeleton to give a very light very comfortable 5cm thick Thermarest - the shape of self inflating mats to come! R-Value is 2.1. Three lengths are available.


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  • Regular
  • £88.00
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  • Large
  • £108.00
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Thermarest Evolite Video


With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

You Pre-Order is prioritised (at no additional charge); meaning that, as soon as the product arrives with us, we can wrap it straight back up and get it sent out to you - it often never even hits the stock room shelves!


With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery Dates

Estimated Delivery Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery Dates provided on product pages.

The Current Estimated Delivery Dates for Thermarest Evolite is

Thermarest Evolite Description

  • Brand : Thermarest
  • Season : Not Applicable
  • Code : CAS EVOL
  • Packaged Weight : 0.62KG
  • A unique combination of what is basically an airmat with a self inflating foam skeleton to give a very light very comfortable 5cm thick Thermarest - the shape of self inflating mats to come! R-Value is 2.1.

    The EvoLite mattress with its patent-pending AirFrame™ construction combines the ultralight, high-loft comfort and compactness of an air mattress, with the convenience and stabilised comfort and support of self-inflation, creating the next big leap in camp comfort innovation. %cm (2) of loft deliver bump-swallowing comfort while exclusive Atmos™ Foam beams add stability, support and excellent self-inflation performance, leaving just a few breaths to top it to your desired firmness.

    • US R-Value is 2.1 (3.7 Tog).
    • 5cm (2) of Loft and Comfort: No other ultralight self-inflating mattress provides this amount of comfort.
    • Ultralight, AirFrame™ Construction: Alternating foam and air channels allow us to drastically reduce weight and packed size while amplifying loft.
    • Supportive Atmos™ Foam: Exclusive Atmos foam is poured in an atmospherically-controlled chamber, allowing precision control over uniformity and loft. The result is the lightest and most compressible foam on the market.
    • Self-Inflating Convenience: Excellent self-inflation allows just a few breaths to top off the mattress for optimal firmness.

    Stuffsack included.

    Buyers Guide

    Togs and R Values: Typically used in the British textile industry, one Tog corresponds to the heat insulation capability of clothing etc which maintains a temperature difference of 0.1°Kelvin while passing a heat flux of 1 Watt/m2*. Some manufacturers (mainly US ones) give an R Value for the insulation properties of their mats. By this they mean an imperial equivalent (°F-ft2-h/Btu). To convert Imperial R values to Togs, multiply by 1.76228. To confuse matters there is also a metric R value, more properly called an RSI value (10 Togs = 1 RSI).
    The higher the Tog or R (or RSI) value the better the insulation provided.
    If you aren't totally confused by the above you should add to the mix that testing for R/Tog/RSI ratings is not by any means an exact science and that it is also expensive so, it is alleged, some figures that are given may be acquired by doing little more than taking a competitor's figure and adding a pinch for good measure. Of course, who is alleging what about whom is also not easy to ascertain!
    *NB One Tog was originally a war time measurement of the amount of warmth retained by a typical male wearing a three piece suit - it originated from research done in the North of England - hence the term tog (though this in turn is thought to originate from the Roman word toga)!

    Sizing Information

    Thermarest Evolite Dimensions Packed Weight
    Small 119cm x 51cm x 5cm 20cm x 10cm 330g
    Regular 183cm x 51cm x 5cm 20cm x 13cm 480g
    Large 196cm x 63cm x 5cm 24cm x 14cm 650g


    Technical Information

    Thermarest Evolite
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