Thermarest Ridgerest Solar Large

£55.00

A very thick and comfortable closed cell foam (cross linked polyethylene) mattress with a heat-reflecting aluminised surface, adding to the effectiveness of heat-trapping valleys and soft, supportive ridges. 183cm x 51cm. R 3.5.

Stock Code: CAS RRSLG

Approximate Packed Weight: 2.1kg

Thermarest Ridgerest Solar Large

Thermarest Ridgerest Solar Large
£55.00
1 In Stock
A very thick and comfortable closed cell foam (cross linked polyethylene) mattress with a heat-reflecting aluminised surface, adding to the effectiveness of heat-trapping valleys and soft, supportive ridges. The coating also adds durability to make this a tough, worry-free mattress.
 
Particularly useful for camping on snow in situations where an inflatable mattress would be tricky to operate - such as at altitude.
 
US R-Value 3.5 (= 6.1 Tog).
 
NB This mat is too big to ship overseas via normal post and so needs to be sent via carrier giving a much higher shipping cost than will be shown if you order one - please only order if you are happy to pay this cost which could be as high as £30.

Thermarest RidgeRest Solar Dimensions Packed Weight
Large 196cm x 63cm x 2cm 64cm x 24cm 740g

 

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)!

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