Rab
Rab Neutrino Down Sleeping Bag (0°C), 2026 model
Where it fits
- Also works for
- Bikepacking, Backpacking and wild camping
- Not for
- Winter mountain
Why these labels
- Bikepacking: Small enough for bike bags: packs to 6 litres
- Backpacking and wild camping: Light to carry: 0.7 kg
- Winter mountain: Comfort rating 5 °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. Capped at 4: needs warmth 9+ (comfort -5 °C or colder).
- Weight: 8/10 How much it adds to your pack, compared with the whole market.
Comfort 5 °C, limit 0 °C (ISO 23537).
Summer camps and spring or autumn hill trips in the UK where nights stay above about 5 °C
- Comfort
- 5 °C
- Limit
- 0 °C
- Fill
- 800 fill down
- Weight
- 700 g (Regular)
Packed size 6 L, 30 cm long and 16 cm across Compare with a 2-litre bottle
About as long as a 2-litre bottle and about one and a half times as wide. Drawn to scale.
Where to buy
Alpinetrek £277.46 In stock. Free delivery.
View at shop: AlpinetrekUltralight Outdoor Gear £314.99 In stock. Free delivery.
View at shop: Ultralight Outdoor GearRab £370 Out of stock.
View at shop: RabPrices 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 5/10How cold a night you can sleep comfortably through. 5: Does the job. Average for wild-camping gear.
Maker's ISO 23537 comfort 5 °C (limit 0 °C) sits in the 0.1 to 5 °C band: a spring-to-autumn bag, not for frost.
Room inside
Estimate from maker's specs: maker's shoulder girth (fewer than 3 reviews about room) 6/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 6: A bit better than average.
No review we found says how roomy it is, so this is an estimate from the maker's shoulder girth.
Weight
From maker's figures 8/10How much it adds to your pack. 8: Clearly better than most.
700 g (Regular) sits in the 700–999 g band, on its lower edge. A UK shop lists 734 g for the same bag; we band the maker's figure.
Packed size
From maker's figures 6/10How much room it takes in your rucksack. 6: A bit better than average.
Maker gives only two figures, 16 x 30 cm, so it's a stuff sack (smaller figure as the diameter): 3.1416 x 8 x 8 x 30 = 6,032 cm³, so 6.0 L, in the 6–8.9 L band.
In short
Good for
- Summer camps and spring or autumn hill trips in the UK where nights stay above about 5 °C
- Backpackers who want a down bag at 700 g that packs to about 6 L
Strengths
- 700 g and about 6 L packed, with 200 g of 800 fill power goose down
- ISO 23537 comfort 5 °C and limit 0 °C
- Down is treated to resist damp (Grangers hydrophobic finish)
- Tougher 20D fabric on the base and foot box, lighter 10D on top
- Sidewall baffles and low cord locks aimed at side sleepers; hand-filled in Derbyshire, UK
Weaknesses
- Comfort rating is 5 °C: cold sleepers will want layers or a warmer bag near freezing
- Tapered fit: restless sleepers may find it snug (Rab also sells a Wide shape in the range)
- No independent hands-on reviews of this 2026 bag yet, so damp, comfort and durability scores are Not enough evidence
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.