Mountain Equipment
Mountain Equipment Xenith II (Regular)
Best use
- Made for
- Backpacking and wild camping
- Also works for
- Bikepacking
- Not for
- Winter mountain
Why these labels
- Backpacking and wild camping: The maker states this use, and the published specs do not rule it out.
- Bikepacking: Small enough for bike bags: packs to 4.8 litres
- Winter mountain: Comfort rating 8 °C: too cold for winter nights
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: 4/10 UK hills in spring and autumn. Wind, rain, and nights near freezing. Capped at 4: needs warmth 7+ (comfort 0 °C or colder).
- Winter camp: 4/10 UK winter or high ground. Below freezing, strong wind, possibly snow. Below this trip's minimum: needs warmth 9+ (comfort -5 °C or colder).
- Weight: 10/10 How much it adds to your pack, compared with the whole market.
Comfort 8 °C, limit 3 °C (ISO 23537).
Lowest price we found
£369.99 at Ultralight Outdoor Gear
Go to Ultralight Outdoor Gear Compare 2 shopsUltralight summer backpacking and trekking in the UK hills when nights stay above about 8 °C
- Zip
- Half, left side
- Comfort
- 8 °C
- Limit
- 3 °C
- Fill
- 900 fill down
- Weight
- 470 g (Regular)
Packed size 4.8 L, 19 x 17 x 15 cm Compare with a 2-litre bottle
Shorter than a 2-litre bottle and about one and a half times as wide. Drawn to scale.
Where to buy
Ultralight Outdoor Gear £369.99 In stock. Free delivery. Regular size, 1 left when checked.
View at shop: Ultralight Outdoor GearSportsShoes £386.99 In stock. Delivery £4.99. Delivery is Standard+ 48 at £4.99; their delivery page lists no free threshold.
View at shop: SportsShoesMountain Equipment £430 Out of stock. Shows 'Coming soon'.
View at shop: Mountain EquipmentPrices 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 3/10How cold a night you can sleep comfortably through. 3: Below average. Fine for some trips, not others.
Maker's comfort figure of 8 °C (limit 3 °C, extreme -10 °C) sits in the 5.1 to 10 °C band: a summer bag. The maker's own 'Good Night's Sleep' figure of 1 °C is not the lab rating and isn't used. It names EN 13537/ISO 23537 but not the edition.
Room inside
Estimate from maker's specs: bag shape (fewer than 3 reviews about room) 3/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 3: Below average. Fine for some trips, not others.
No review we found says how roomy it is, so this is an estimate from the bag shape.
Weight
From maker's figures 10/10How much it adds to your pack. 10: The best you can buy for this.
The maker's 470 g for the Regular is under 700 g. One shop lists 490 g, same band.
Packed size
From maker's figures 8/10How much room it takes in your rucksack. 8: Clearly better than most.
The maker gives no packed size; a UK shop lists 19 x 17 x 15 cm: 19 x 17 x 15 = 4,845 cm³, so 4.8 L, in the 4–5.9 L band.
In short
Good for
- Ultralight summer backpacking and trekking in the UK hills when nights stay above about 8 °C
- Fastpackers and cyclists who want a full hood and full-length zip at under 500 g
- Adding to a down jacket for cooler nights
Strengths
- Only 470 g with 197 g of 900-fill goose down
- Packs to about 5 L
- Full-length Gemini zip baffle (110 cm zip), integrated collar and five-baffle hood, which many ultralight summer bags skip
- Offset three-baffle foot box, per the maker
Weaknesses
- Only a summer bag: comfort 8 °C, limit 3 °C
- The down is not water-resistant treated, so a wet bag loses warmth
- No independent review of the Xenith II found, so damp, comfort and durability are estimates, not reviewed scores
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.