Exped
Exped Ultra 6.5R Mummy (M)
Best use
- Made for
- Bikepacking, Backpacking and wild camping, Winter mountain
Why these labels
- Bikepacking: The maker states this use, and the published specs do not rule it out.
- Backpacking and wild camping: The maker states this use, and the published specs do not rule it out.
- Winter mountain: The maker states this use, and the published specs do not rule it out.
From the maker's stated use and the published specs.
- Summer wild camp: 9/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 9/10 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: 9/10 How much it adds to your pack, compared with the whole market.
R-value 6.9 (ASTM).
Autumn to winter wild camps where nights drop below freezing (R 6.9)
- Valve
- flat valve
- Type
- Air
- R-value
- 6.9 (ASTM)
- Weight
- 360 g (M Mummy)
- Thickness
- 9 cm
- Size
- 183 x 52 cm
Packed size 1.8 L, 21 cm long and 10.5 cm across Compare with a 2-litre bottle
Shorter than a 2-litre bottle and about as wide as one. Drawn to scale.
Where to buy
Trekitt £171 In stock. Free delivery. 10% off the £190 list price; free next-day delivery over £65. Its page still says R 6.4.
View at shop: TrekittUltralight Outdoor Gear £174.99 In stock. Free delivery.
View at shop: Ultralight Outdoor GearExped £190 In stock. M / Lichen in stock. Free delivery over £75; £6.00 DPD under £75.
View at shop: ExpedPrices 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.
Exped lists an ASTM R-value of 6.9, in the R 5.5+ band: all-season and winter-capable. Some shop pages still show 6.4; we use Exped's figure.
Thickness
From maker's figures 9/10How deep it is. Deeper is comfier, above all for side sleepers. 9: Among the best you can buy for this.
9 cm thick.
Quietness
From reviews 8/10How little it crinkles or squeaks when you turn over. 8: Clearly better than most.
Four reviewers call the Ultra 6.5R quiet, with less crinkle than most foil-lined pads.
Weight
From maker's figures 9/10How much it adds to your pack. 9: Among the best you can buy for this.
Exped lists 360 g for the M mummy (mat only), under the 400 g line. Some shops show 340 g or 357 g.
Packed size
From maker's figures 8/10How much room it takes in or on your rucksack. 8: Clearly better than most.
Exped gives 21 x 10.5 cm and no litres: 3.1416 x 5.25 x 5.25 x 21 = 1,818 cm³, so 1.8 L, in the 1.5–2.4 L band.
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 8/10How comfy it is, including for side sleepers.
6 reviews on comfort, e.g. "We had a hard time feeling any rocks or roots under our pads".
Reviewers disagree on this.
Stability*
Reviewers' average 8/10How well you stay on it without rolling off or bouncing.
4 reviews on stability, e.g. "help keep you centered on the pad, making it harder to roll off onto the tent floor".
Durability*
Reviewers' average 7/10How well it resists punctures, leaks and worn valves over seasons of use.
4 reviews on durability, e.g. "We haven’t had any issues with the fabric’s durability, punctures, or holes.".
Reviewers disagree on this.
In short
Good for
- Autumn to winter wild camps where nights drop below freezing (R 6.9)
- Cold sleepers who want a winter-rated mat under 400 g
- Backpackers who need a 9 cm thick mat that packs to about 1.8 litres
Strengths
- R 6.9 at 360 g: very warm for its weight
- Packs to about 1.8 litres (21 x 10.5 cm)
- Reviewers call it quiet (GearJunkie headline: "quiet warmth-to-weight winner")
- 9 cm thick
- Treeline used it for 50+ nights without a failure
Weaknesses
- Thin 20D fabric: three reviewers say take care on sharp or rough ground, so use a groundsheet and carry a repair kit
- The mummy taper (52 cm wide at the shoulders) limits sprawling
- SectionHiker found it less supportive than firmer, thicker pads and bottomed out his knees
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (9)
- Exped: Ultra 6.5R Mummy specifications (M)
- Treeline Review: Exped Ultra 6.5R sleeping pad review (mummy and rectangular, 50+ nights)
- GearJunkie: EXPED Ultra 6.5R sleeping pad review (3 nights on snow, pre-production rectangular M)
- Better Trail: Exped Ultra 6.5R review (medium-wide mummy)
- SectionHiker: Review of the Exped Ultra 6.5R sleeping pad (medium-wide mummy)
- Live for the Outdoors: Exped Ultra 6.5R sleeping mat, tested and reviewed (medium-wide rectangular)
- Backpacker: Best sleeping pads
- Packstack: Exped Ultra 6.5R
- CleverHiker: Exped Ultra 6.5R sleeping pad review