NEMO
NEMO Riff 15
No citable owner-review average published for this one, so no stars.
The Disco's trimmer, more expensive sibling: the same Spoon silhouette and the same Thermo Gills in a narrower cut with 800-fill down instead of 650. That buys four ounces and half a litre of pack space for $100. Whether that is a good trade depends entirely on how far you are carrying it — for a weekend it is not, for a long trail it very much is.
Label against lab
NEMO publishes an ISO 23537 lower limit of 17 °F but no comfort figure. The comfort rating typically runs ten to twelve degrees warmer than the limit, so plan around the low thirties rather than the number on the label. Comfort against limit
At that temperature the pairing table wants at least an R 5.5 pad underneath it.
Size run
One product, 2 sizes. The headline numbers on this page describe the Regular.
| Size | Weight | Approx. price | Length | Shoulder girth |
|---|---|---|---|---|
| Regular | 2 lb 7 oz | ~$400 | — | — |
| Long | 2 lb 10 oz | ~$450 | — | — |
Specifications
Highlights
Features
- ISO or EN rated
- Hydrophobic down
- RDS down
- Draft collar
- Full-length zipper
- Spoon shape
- Recycled fabric
What it does well
- 800-fill down cuts four ounces and half a litre off the Disco at the same rated temperature.
- Keeps the Spoon shape, so it is still the side sleeper's bag — just a trimmer version of it.
- ISO lower limit of 17 °F published.
- Thermo Gills let a warm night be survived without unzipping the whole bag.
What it costs you
- $400 against the Disco's $300 for four ounces — the most expensive ounces in this catalogue.
- Only two lengths and no wide option, unlike the Disco's four sizes.
- Like every NEMO bag here, the ISO comfort figure is not published.
- The trimmer cut undoes some of the Spoon's point if you were buying it for room.
Those two lists are drawn from NEMO’s published specifications and from reviews that measured them. They are not owner sentiment — anything owners said appears under its own heading below.
What owners say
No owner discussion has been collected for the NEMO Riff 15 yet. The pros and cons above come from NEMO’s published specifications and from reviews that measured them — nothing on this page claims owners said anything. How that works.
NEMO Riff 15, head to head
Others in the same band
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NEMO
NEMO Disco 15
The Spoon shape is NEMO's one genuinely original idea in sleeping bags: extra room cut in at the elbows and knees and taken back out at the shins, so a side sleeper can bend a leg without fighting the bag. If you have ever woken up wrapped in a mummy bag that rotated with you, this is the fix. The Disco is the 650-fill version — heavier and bulkier than the 800-fill Riff above it, and $100 cheaper. NEMO publishes an ISO lower limit of 16 °F but no comfort figure, which is the standard half-disclosure across this brand's line; assume comfort lands roughly ten degrees warmer.
Best for: Side sleepers who find mummy bags claustrophobic
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NEMO Forte 20
The synthetic Spoon bag, and the right recommendation for anyone camping somewhere persistently damp — the Pacific Northwest, the Appalachians in spring, anywhere a down bag spends a week slowly losing loft. Zerofiber is made entirely from post-consumer recycled polyester, and it keeps insulating wet, which down does not. The cost is real: 53 ounces and 10.6 litres of pack space, roughly a quarter more weight and 60% more volume than the down Disco at a similar rating.
Best for: Wet-climate camping where down is the wrong insulation
Full spec sheetREI Co-op
REI Co-op Magma 15
The Magma is the bag most people who compare specs end up buying, and the numbers explain why: 850-fill down, 23.3 ounces of it, an ISO comfort rating of 21 °F and an ISO lower limit of 9 °F, for $399. That is a genuinely six-degrees-warmer comfort figure than the 15 in the name, which is the opposite direction from almost every other bag in this catalogue — REI named the bag closer to its limit than its comfort and then published both, which is the honest way round.
Best for: Backpackers who want the best published numbers per dollar
Full spec sheet