Thermarest NeoAir XLite NXT Sleeping Mat

From £189.00
£210.00
Save 10%

Super lightweight air mattress that has to be seen to be believed. 4.5 R-Value. Several sizes.

Thermarest NeoAir XLite NXT Sleeping Mat

Solar Flare Regular
£189.00
£210.00
Save 10%
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Solar Flare Regular Short
£189.00
£210.00
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Solar Flare Regular Wide
£211.50
£235.00
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Solar Flare Large
£225.00
£250.00
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A rectangular version of the super lightweight air mattress that has to be seen to be believed. With cutting edge Triangular Core Matrix™ construction and ThermaCapture™ technology, the XTherm XLite NXT boasts an amazing 4.5 (4 season) R-value while weighing just 350g in the Regular size. It is warmer, and thicker than the previous model, while remaining at much the same weight, which is why the XTherm XLite NXT is likely to become the choice sleeping mat for alpinists, mountaineers and extreme cold expeditions. At 7.6cm (3") thick, with horizontal baffles, all-night comfort, support and warmth are guaranteed in almost all situations, while 70D nylon on the bottom ensures the XTherm XLite NXT holds up to extended expedition use. The WingLock™ Valve allows for rapid inflation and deflation but is also intuitive and easy to use in icy weather when its best not to take your gloves off.

  • Refined Triangular Core Matrix construction and ThermaCapture technology deliver a cold-conquering 4.5 R-Value.  
  • A 7.6cm thick profile and horizontal baffled structure delivers superb comfort while keeping the weight to a minimum.
  • 70D nylon on the bottom withstands the wear and tear of extended expedition use, while 30D ripstop nylon on top keeps it light and packable. 
  •  WingLock™ Valve gives fast one-way inflation and rapid deflation without giving up the ability to easily purge air while you lay on it for comfort micro-adjustments - even with gloves on.

Pump sack, stuff sack and repair kit included.

It comes in several sizes.

Thermarest NeoAir XLite NXT R-value Dimensions Packed Weight
Regular 4.5 183cm x 51cm x 7.6cm 23cm x 10cm 350g
Regular Short 4.5 168cm x 51cm x 7.6cm 23cm x 10cm 330g
Regular Wide 4.5 183cm x 64cm x 7.6cm 28cm x 12cm 440g
Large 4.5 196cm x 64m x 7.6cm 28cm x 12cm 470g

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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