Nemo
Nemo Soul 30 (comfort 5 °C, limit 0 °C) Endless Promise Synthetic Sleeping Bag (Regular)
Where it fits
- Also works for
- Backpacking and wild camping
- Not for
- Winter mountain
Why these labels
- Backpacking and wild camping: Light to carry: 0.9 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: 6/10 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: 7/10 How much it adds to your pack, compared with the whole market.
Comfort 5 °C, limit 0 °C (ISO 23537).
Mild spring and early autumn camps where nights stay above about 0 °C
- Comfort
- 5 °C
- Limit
- 0 °C
- Fill
- synthetic
- Weight
- 875 g (Regular)
Packed size 6.4 L, 26.5 cm long and 18 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 £183.57 In stock. Free delivery. Shop shows list price £269.95. Free UK delivery from £85. Cheapest in-stock colour for Regular (Blue Granite).
View at shop: AlpinetrekUltralight Outdoor Gear £244.99 In stock. Free delivery. Shop shows RRP £269.99. Free UK delivery over £15.
View at shop: Ultralight Outdoor GearPrices 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.
Nemo gives an ISO comfort figure of 5 °C (limit 0 °C) for the Regular, which sits in the 0.1 to 5 °C band. The maker's figure, not re-tested. Nemo's model name lists the limit first, then the comfort rating.
Room inside
Estimate: only 1 review about room inside (fewer than the 3 we need, so never above 8) 6/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 6: A bit better than average.
The one review found calls the Soul a classic mummy that is neither generous nor tight. Too little evidence to say more.
Weight
From maker's figures 7/10How much it adds to your pack. 7: Better than most.
Nemo's minimum weight of 875 g (without sacks; 950 g packed with them) sits in the 700-999 g band.
Packed size
From maker's figures 6/10How much room it takes in your rucksack. 6: A bit better than average.
Nemo states a compressed volume of 6.4 L, in the 6-8.9 L band. The 26.5 x 18 cm sack works out close to that: 3.1416 x 9 x 9 x 26.5 = 6,743 cm3, about 6.7 L.
In short
Good for
- Mild spring and early autumn camps where nights stay above about 0 °C
- Backpackers who want a synthetic bag under 1 kg that is small enough for a pack
- Campers who often wake to a damp tent wall and want a waterproof panel over the footbox and hood
Strengths
- Light and small for a synthetic bag: 875 g and 6.4 L for the Regular
- Recycled Zerofiber 800 synthetic fill, so a damp night is less of a worry than with ordinary down
- Waterproof reinforced hood and footbox to keep tent condensation out of the fill
- Internal draft collar (Headwall) and a chest vent (Thermo Gill) with a zippered footbox opening for airflow; Adventure Alan calls the collar very effective at stopping draughts
- Comes in Short, Regular and Long, and there is a warmer version of the same shape
Weaknesses
- Only a mild-weather bag: comfort 5 °C and limit 0 °C, so it is not a UK winter bag and cold sleepers will want a warmer one for frosty nights
- Short zip: Adventure Alan found the half-length zip harder to climb in and out of, and it cannot open fully for maximum airflow
- Synthetic fill is bulkier than down at the same warmth, and Adventure Alan notes it packs bigger than down
- Only one independent hands-on review found, from the first weeks of use, so damp performance, comfort and durability are estimates, not reviewed scores
- The Regular fits up to 183 cm: taller sleepers need the Long (950 g, 6.6 L)
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.