OEX
OEX Flux 4 Ultralite Inflatable Mat (184 x 59 cm)
Where it fits
- Also works for
- Backpacking and wild camping
Why these labels
- Backpacking and wild camping: Light to carry: 0.5 kg
From the maker's stated use and the published specs.
- Summer wild camp: 7/10 UK, roughly May to September, nights above about 8 °C, sheltered pitches.
- Three-season hills: 7/10 UK hills in spring and autumn. Wind, rain, and nights near freezing.
- Winter camp: 7/10 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 4.
A light 8 cm air mat for year-round camping and backpacking, wider than a standard 51 cm mat
- Type
- Air
- R-value
- 4 (not ASTM)
- Weight
- 515 g (184 x 59 x 8 cm)
- Thickness
- 8 cm
- Size
- 184 x 59 cm
- Packed
- Not published
Where to buy
Millets £60 In stock. Delivery £3.99. Free delivery over £70.
View at shop: MilletsBlacks £60 In stock. Delivery £4.99. Free delivery over £95.
View at shop: BlacksGO Outdoors £75 In stock. Delivery £3.99. Free delivery over £80.
View at shop: GO OutdoorsPrices 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
Estimate from maker's specs: maker's R-value (not ASTM tested) 7/10How well it stops the cold ground chilling you. 7: Better than most.
Estimate from maker's specs
Thickness
From maker's figures 8/10How deep it is. Deeper is comfier, above all for side sleepers. 8: Clearly better than most.
8 cm thick.
Quietness
Estimate from maker's specs: mat type (fewer than 3 reviews about noise) 5/10How little it crinkles or squeaks when you turn over. 5: Does the job. Average for wild-camping gear.
No review we found says how noisy it is, so this is an estimate from the mat type.
Weight
From maker's figures 7/10How much it adds to your pack. 7: Better than most.
515 g (the brand's figure, same on GO Outdoors, Millets and Blacks) sits in the 400-549 g band.
Packed size
Estimate from maker's specs: mat weight (no packed size published) 7/10How much room it takes in or on your rucksack. 7: Better than most.
Estimate from maker's specs
In short
Good for
- A light 8 cm air mat for year-round camping and backpacking, wider than a standard 51 cm mat
- Family camping, where one buyer's children used them for 10 days
Strengths
- Weighs 515 g and is 8 cm thick, per OEX
- Measures 184 x 59 cm, with a 120 kg load limit stated by OEX
- Includes a pump bag for inflating
- One GO Outdoors buyer called it lightweight, comfortable and easy to inflate and deflate
Weaknesses
- Three GO Outdoors buyers said theirs deflated or went flat in use, one within an hour
- One GO Outdoors buyer weighed the mat at 615 g against the listed 515 g, and 715 g with pump bag and sack
- OEX gives it R 4, described as all-season use
- Own-brand mat sold only by GO Outdoors, Millets and Blacks
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.