Beacons Products Expedition Summit 12 XL Mat

£49.99
Exceptionally lightweight extreme mat for use on ice and snow, offering high protection, warmth and comfort. Season Rating: 5. US R value is 1.70 (= 3 Tog).

Stock Code: BEA EXPSUM

Approximate Packed Weight: 2kg

Beacons Products Expedition Summit 12 XL Mat

Beacons Products Expedition Summit 12 XL Mat
£49.99
2 In Stock

Exceptionally lightweight extreme mat for use on ice and snow, offering high protection, warmth and comfort. Very comfortable, warm (has been tested to -51ºC in Antarctica), lightweight, abrasion resistant, waterproof, and CFC free. Comes rolled in a plastic sleeve, and has two eyelets and tape ties. Easy to carry and compact to store.

The value of a mat like this is that it is virtually indestructible and can be used in conjunction with another mat at basecamp and on its own on bivis. It is also useful for insulating snow furniture while hanging around basecamp, leaving your other mat in your tent keeping your sleeping bag from getting cold.

Season Rating: 5.

US R value is 1.70 (= 3 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.

  Dimensions Packed Weight
Beacons Products - Expedition Summit XL Mat 185cm x 57.5cm x 1cm 57.5cm x 18cm 364g

 

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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