Thermarest TrailLite

£63.00
£70.00
Save 10%

A light, compact 3/4-Season mattress. US R value is 3.4 (= 6 Tog).

Thermarest TrailLite

Regular
£63.00
£70.00
Save 10%
2 In Stock
Women's
£63.00
£70.00
Save 10%
3 In Stock

The TrailLite is a light, compact 3/4-Season mattress. It provides a good mat at a great price where weight is not the most important consideration.

US R value is 3.4 (= 6 Tog).

Stuff sack included.

Thermarest Trail Lite Dimensions Packed Weight
Regular 183cm x 51cm x 3.8cm 66cm x 12cm 910g
Women's 168cm x 51cm x 3.8cm 28cm x 9cm 310g

 

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)!

We have placed cookies on your device to help make this website better.

Your order contains no items