Nemo Tensor Extreme Conditions Ultralight Insulated Sleeping Pad

With its Apex™ baffle internal structure, the Nemo Tensor Extreme Conditions toasts the competition, achieving an 8.5 R-value and a mind-bending warmth-to-weight ratio. Now the warmest, most insulating ultralight pad on the market (according to Nemo), it’s also still the quietest mat in its class.

Using distinctly shaped baffles, the Apex™ design evenly suspends four layers of insulating Thermal Mirror™ film inside the mat. The strategic placement and number of layers combine to produce incredible warmth at as little as 555g, making this mat a winter-worthy companion that won’t weigh you down. Just as important, the floating construction prevents annoying crinkling noises so you and your camp partners can sleep soundly even on the most restless nights. Warmth, quiet, and 9cm of stable cushioning together make Tensor mats synonymous with comfort.

Covered with premium, durable 20D (top) and 40D (bottom) nylon, Tensor Trail is better protected than most against punctures and tears, and - like all Nemo sleeping mats - it includes a Vortex™ pump sack. The Vortex pump effortlessly mates with the mat’s zero-profile, microadjustable Laylow™ valve for easy inflation in just minutes.

• Apex™ baffle design suspends more insulating layers than ever before, strategically spaced for the highest R-value possible - 8.5.
• Four layers of floating Thermal Mirror™ metallised film provide quiet insulation with an unprecedented warmth-to-weight ratio.
• Impressively quiet for uninterrupted sleep (and happy neighbours).
• 3½ inches (9 cm) of stable, cushioned loft for incredibly comfortable nights.
• Bluesign® approved premium nylon fabrics shave grams while offering superior puncture- and tear-resistance.
• Included Vortex™ pump sack provides easy and fast inflation, saves breath at elevation, and minimises moisture entering the mat.
• Improved zero-profile, multifunctional, microadjustable Laylow™ valve offers customised inflation control, even in cold temperatures.
• Available in a wide range of sizes to easily pair with the rest of your sleep system.
• Includes Vortex Pump Sack, Stuff Sack, Velcro Strap and Repair Kit.

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)!

All Nemo products carry a lifetime warranty against defects in workmanship and materials to the original owner, with proof of purchase from an authorised Nemo dealer. Please see Nemo's Warranty page for more information.