Nemo
Nemo Disco 15 Endless Promise (men's, Regular)
Best use
- Made for
- Backpacking and wild camping
- 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.
- Winter mountain: Comfort rating -3 °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: 7/10 UK hills in spring and autumn. Wind, rain, and nights near freezing.
- 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: 5/10 How much it adds to your pack, compared with the whole market.
Comfort -3 °C, limit -9 °C (ISO 23537).
Side sleepers and restless sleepers who find mummy bags tight, on spring-to-autumn UK camps
- Comfort
- -3 °C
- Limit
- -9 °C
- Fill
- 650 fill down
- Weight
- 1.23 kg (Regular)
Packed size 6.7 L, 29 cm long and 21 cm across Compare with a 2-litre bottle
About as long as a 2-litre bottle and about twice as wide. Drawn to scale.
Where to buy
Alpinetrek £217.57 In stock. Free delivery.
View at shop: AlpinetrekSnow+Rock £272.95 Out of stock.
View at shop: Snow+RockPrices 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 8/10How cold a night you can sleep comfortably through. 8: Clearly better than most.
ISO comfort -3 °C (limit -9 °C) sits in the -4.9 to 0 °C band: a three-season bag, not a winter one.
Room inside
From reviews 10/10How much room to move, bend your knees and sleep on your side. Roomier is comfier. 10: The best you can buy for this.
Reviewers agree this is one of the roomiest backpacking bags: its spoon shape gives extra space at the shoulders and knees, so side sleepers can bend their knees and roll over easily. The trade-off is dead space that takes longer to warm up.
Weight
From maker's figures 5/10How much it adds to your pack. 5: Does the job. Average for wild-camping gear.
1,230 g (the maker's minimum weight, Regular) sits in the 1,000–1,299 g band; with the compression sack it is 1.3 kg.
Packed size
From maker's figures 6/10How much room it takes in your rucksack. 6: A bit better than average.
Maker states a 6.7 L compressed volume, so we use that (6–8.9 L band). Its own 29 x 21 cm packed size works out larger: 3.1416 x 10.5 x 10.5 x 29 = about 10 L, which would be the 9–12.9 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 to sleep in*
Reviewers' average 9/10How comfy the shape, hood and fabric feel; not the temperature rating.
5 reviews on comfort to sleep in, e.g. "This unusually shaped down sleeping bag is mega comfortable, especially for side sleepers.".
Zip*
Reviewers' average 7/10How smoothly the zip runs without snagging.
4 reviews on zip, e.g. "I found zipping up and down the bag to be fairly easy even when running to the bathroom in the middle of the night".
In short
Good for
- Side sleepers and restless sleepers who find mummy bags tight, on spring-to-autumn UK camps
- Short backpacking trips and car-based camping where a good night's sleep matters more than pack weight
Strengths
- Roomy spoon shape lets you roll over and bend your knees without twisting the bag
- Chest vents (Thermo Gills) and a big fold-out collar let you cool down or seal in warmth without unzipping the bag
- Waterproof hood and footbox keep tent-wall condensation out of the down
- Comes with a pillow pocket, a compression sack and a take-back recycling scheme
Weaknesses
- Heavy for a down bag at 1.23 kg, and reviewers say it is bulky to carry
- The roomy cut leaves more air to warm up, so it feels colder than a close-fitting bag with the same rating
- The maker's packed volume (6.7 L) doesn't match its own packed size (about 10 L), so check it fits your rucksack
- The small vent zips are fiddly to use in the dark
- Some people find the spoon shape too loose or draughty
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (8)
- NEMO Equipment: Disco Men's Endless Promise Down Sleeping Bag, 15F Regular specifications (US site)
- Live for the Outdoors: Nemo Disco 15 sleeping bag review
- Treeline Review: NEMO Disco Endless Promise Sleeping Bag In-Depth Review
- CleverHiker: NEMO Disco 15 Endless Promise Sleeping Bag Review
- Better Trail: Nemo Disco Endless Promise 15 Sleeping Bag Review
- The Broke Backpacker: Nemo Disco 15 review
- Outdoors Magic: Nemo Disco Endless Promise 15F Sleeping Bag review
- CleverHiker: NEMO Disco 15 Endless Promise Sleeping Bag Review