Nemo
Nemo Tensor Extreme Conditions Ultralight Insulated Sleeping Pad (Regular)
Best use
- Made for
- Winter mountain
- Also works for
- Backpacking and wild camping
Why these labels
- Winter mountain: The maker states this use, and the published specs do not rule it out.
- Backpacking and wild camping: Light to carry: 0.5 kg
From the maker's stated use and the published specs.
- Summer wild camp: 8/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 8/10 UK hills in spring and autumn. Wind, rain, and nights near freezing.
- Winter camp: 9/10 UK winter or high ground. Below freezing, strong wind, possibly snow.
- Weight: 7/10 How much it adds to your pack, compared with the whole market.
R-value 8.5 (ASTM).
Winter wild camps, snow and high-level summit camps where the ground is frozen
- Valve
- Laylow micro-adjustable valve
- Baffles
- Apex baffle
- Type
- Air
- R-value
- 8.5 (ASTM)
- Weight
- 505 g (Regular)
- Thickness
- 8.9 cm
- Size
- 183 x 51 cm
Packed size 2.4 L, 25.5 cm long and 11 cm across Compare with a 2-litre bottle
About as long as a 2-litre bottle and about as wide as one. Drawn to scale.
Where to buy
WildBounds £186.95 In stock. Free delivery. Regular size; list price £249.95; free UK delivery over £50.
View at shop: WildBoundsUltralight Outdoor Gear £224.99 In stock. Free delivery. RRP £249.99 on its page; free UK delivery over £15.
View at shop: Ultralight Outdoor GearAlpinetrek £187.46 Out of stock. Regular size, price includes duties and taxes; list price £249.95; free UK delivery from £85.
View at shop: AlpinetrekPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Warmth
From maker's figures 10/10How well it stops the cold ground chilling you. 10: The best you can buy for this.
Nemo's R-value of 8.5 is marked 'ASTM F3340-18' in the R-value graphic on its product page, above the R 5.5 line. On the Cairngorm plateau at about -14 °C The Great Outdoors still felt a little cold through it and would carry a reserve foam mat.
Thickness
From maker's figures 8/10How deep it is. Deeper is comfier, above all for side sleepers. 8: Clearly better than most.
8.9 cm thick.
Quietness
From reviews 7/10How little it crinkles or squeaks when you turn over. 7: Better than most.
Reviewers are split: most call it quiet with at most a slight crinkle, but one calls it pretty noisy.
Reviewers disagree on this.
Weight
From maker's figures 7/10How much it adds to your pack. 7: Better than most.
Nemo's minimum weight for the regular is 505 g (mat alone), in the 400 to 549 g band. OutdoorGearLab weighed a regular mummy at 462 g bare.
Packed size
From maker's figures 7/10How much room it takes in or on your rucksack. 7: Better than most.
Nemo gives 25.5 cm long and 11 cm across, about 2.4 L, in the 1.5 to 2.4 L band. OutdoorGearLab measured 2.6 L, which would be the next band down.
What reviewers say (out of 10)
Ratings marked * are from reviews and are not part of the trip score. They are reviewers' scores, not our own measurements. How we score
Comfort*
Reviewers' average 9/10How comfy it is, including for side sleepers.
7 reviews on comfort, e.g. "the regular wide takes up a fair bit of room but is very, very comfortable.".
Stability*
Reviewers' average 8/10How well you stay on it without rolling off or bouncing.
6 reviews on stability, e.g. "I was in no danger of falling off the edges".
Reviewers disagree on this.
In short
Good for
- Winter wild camps, snow and high-level summit camps where the ground is frozen
- One mat for all four seasons if you can carry a few hundred grams more than a summer mat
- Stacking under a winter sleeping bag for ski touring or mountaineering
Strengths
- R 8.5 for 505 g: one of the warmest air mats you can carry
- 8.9 cm thick with grid baffles; reviewers praise it for side sleepers
- 40D base fabric makes it tougher than earlier Tensors
- Vortex pump sack, two-stage low-profile valve and repair kit for both fabrics are included
- Packs to about 25.5 x 11 cm
- Lifetime warranty to the original owner from authorised dealers
Weaknesses
- The Great Outdoors still felt the cold a little through it at about -14 °C and would carry a foam mat as a back-up
- Reviewers disagree on noise: The Great Outdoors and Treeline call it quiet, Field Mag and Advnture hear some crinkle
- The low-profile valve can open by accident when you prop yourself up (Better Trail)
- Smooth top lets a pillow slide off (Advnture)
- Heavier and bulkier than a summer mat: 505 g and about 2.4 L (2.6 L as measured by OutdoorGearLab)
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (9)
- NEMO Equipment: Tensor Extreme Conditions Ultralight Insulated Sleeping Pad (regular specifications)
- The Great Outdoors: Nemo Tensor Extreme Review (regular wide, Cairngorms)
- OutdoorGearLab: Nemo Tensor Extreme Conditions Ultralight Insulated Review
- Better Trail: Nemo Tensor Extreme Conditions Sleeping Pad Review (regular, rectangular)
- Advnture: Nemo Tensor Extreme Conditions Ultralight Insulated Sleeping Pad review (regular wide, Lake District)
- Treeline Backpacker: Nemo Extreme Conditions Insulated Ultralight Sleeping Pad Review (regular wide)
- Field Mag: 9 Best Ultralight Sleeping Pads for Backpacking, Trail Tested (Tensor Extreme Conditions)
- Treeline Review: NEMO Tensor All-Season and Extreme reviews
- Australian Geographic: Nemo Tensor Extreme Conditions tested