Nemo Tensor Trail Regular Mummy Sleeping Mat

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Nemo’s Tensor Trail is a lightweight sleeping pad designed for spring, summer, and early Autumn camping. It features a R-value of 2.8, providing optimal comfort during warmer temperatures.

Nemo says: 

Improving on our original, best-selling Tensor line, Tensor Trail offers versatile warmth (a 2.8 R-value) for three-season adventurers that prioritize weight. Designed to take you from spring to fall, it keeps nights restful and packs up light.

The pad’s interior features NEMO’s proprietary Spaceframe™ baffle design, which utilizes low-stretch fabric trusses to create stable support and offer just the right amount of give — all while avoiding any wobbly waterbed feeling. Inside each baffle is a suspended layer of ultra-thin, metallized Thermal Mirror™ film, which efficiently reflects body heat and contributes to the pad’s overall 2.8 R-value. The layer’s clever floating construction eliminates the crinkling, crunchy sound that many insulated air pads are known for, earning Tensor a reputation for peace and quiet under the stars.

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

Our Verdict

Nemo’s Tensor sleeping pads have been revamped, and the lightest model in the new range is the Tensor Trail. The Tensor Trail is a great option for spring, summer, and early Autumncamping because it has a R-value of 2.8, which provides optimal comfort during warmer temperatures. A layer of “Thermal Mirror Metallised Film” suspended throughout the mat insulates it. This layer reflects body heat back to the sleeper, and since it’s suspended rather than welded, it decreases rustling or crunching noises, making the mat silent. The 3 ½ inches (8.9cm) thick, plush pad has a dimpled sleep surface and Nemo’s ‘Spaceframe’ baffle construction, which lessens bounce and creates a stable surface that equally distributes weight, making it suitable for side sleepers.

The pad is made from high-quality recycled ripstop nylon with a 20D fabric on top and a more durable 40D fabric on the bottom. The mat includes Nemo’s Vortex Pump Sack, one of the most efficient pump sacks. It fits snugly on the “lay low” valve for easy inflation and deflation. The Vortex Pump Sack can fully inflate the pad in less than six blasts.

– Reviewed by Ultralight Outdoor Gear

Features

• Spaceframe™ Baffles – Unique construction offers unparalleled stability and weight distribution, using low-stretch, die-cut trusses to eliminate springiness.
• Stable & Supportive – Low-stretch fabric trusses keep elbows and hips from sinking through to the ground and prevent a waterbed-like sensation
  
• Durable Performance Fabrics – 20D recycled nylon ripstop (top) and 40D nylon (bottom) offer superior puncture and tear resistance at a super-light weight.
  
• Whisper-Quiet – Floating suspended film won’t crunch against the other layers when you adjust your position.
  
• Thermal Mirror™ Insulation – Two layers of metallized film are suspended within each baffle to provide quiet insulation and an unprecedented weight-to-warmth ratio.
  
• Laylow™ Valve – Updated zero-profile, microadjustable valve is designed to perform in cold temps and is now easier to operate in any condition.
  
• Vortex™ Pump Sack – Included pump sack provides a speedy inflation method that reduces the amount of moisture introduced in the pad
  

Specifications

• Weight: 375g (excluding pump + bag)
• Dimensions: 72 x 20 in / 183 x 51 cm
• Thickness: 3.5 in / 9 cm
• Packed Size: 10.0 x 4.0 in dia / 25.5 x 9.5 cm dia
  
• R-Value: 2.8

Material & Construction

• 20D recycled nylon ripstop (top) and 40D nylon (bottom)
• bluesign® Approved
• Insulation: Aluminized Film

ASTM R-Value:

From 2020, there is a new industry standard for measuring the R-value (level of insulation) of sleeping mats – ASTM F3340-18. This new standard is the sleeping mat equivalent to the EN rating for sleeping bags. You can now directly compare the R-value of mats rated using the ASTM F3340-18 with confidence that is a fair and accurate comparison between mats. In simple terms, the higher the R-value, the warmer the mat.

In general terms, an R-value below 2.0 is for summer use, 2.0 to 4.0 is for cooler 3 season use and 4.0+ is for winter temperatures. This will be also be dependent on your sleeping bag, how cold you sleep etc. Please contact our customer service team if you need advice on choosing the right mat for your activity.

Help & advice:

• The Ultimate Guide to Choosing an Ultralight Sleeping Mat
• Time-Saver Guide to Choosing a Sleeping Mat
• R-Value Explained
• About Nemo
• Nemo Sleeping Mat Guide
• Nemo Video Resources
• What is Bluesign?