Which is better for cold weather?

The Rab Neutrino 400. It is rated to -7C with 800-fill down, while the NEMO Disco 30 is rated to 30F with 650-fill down.

Which is better for side sleepers?

The NEMO Disco 30. Its Spoon shape leaves room at the knees and elbows, and the Rab's tapered cut is snug.

Both hold up with care. The Rab's higher-fill down and ripstop shell resist loft loss better over years of hard use; store either uncompressed.

Is the Rab worth stepping up to?

If you backpack in cold or alpine conditions, yes. It is warmer and lighter. For mild-weather camping, the NEMO is the more comfortable choice.

Can I vent the NEMO without losing warmth?

Yes. The Thermo Gills let you dump heat from the torso without opening the main zip, which the Rab's 3/4 zip does not offer.

Rab Neutrino 400 Sleeping Bag vs NEMO Disco 30 Sleeping Bag

The Rab Neutrino 400 is the warmer, lighter bag for cold mountain trips, with 800-fill down and a close tapered cut. The NEMO Disco 30 is roomier and more forgiving for side sleepers and casual campers, but its 650-fill down and spoon shape trade warmth-to-weight for comfort. Reviewers praise Rab's loft and build for alpine use; NEMO owners like the room and Thermo Gills for venting.

Choose the Rab Neutrino 400 if you sleep cold, backpack in shoulder seasons or alpine terrain, and want the most warmth per ounce.
Choose the NEMO Disco 30 if you are a side sleeper who wants room to move and mostly camp in milder three-season weather.

Prices

Rab Neutrino 400 Sleeping Bag: $304.99 at evo.com (checked today)
NEMO Disco 30 Sleeping Bag: $167.93 at REI (last seen Nov 10)
Difference: the NEMO Disco 30 Sleeping Bag is $137.06 cheaper than the Rab Neutrino 400 Sleeping Bag at the latest prices (Nov 10 and Nov 12)

What separates them

	Rab Neutrino 400 Sleeping Bag	NEMO Disco 30 Sleeping Bag
Temperature rating	Rated to -7C (about 20F)	Rated to 30F
Fill power	800-fill RDS goose down	650-fill RDS down
Weight	895 g in Long Wide	About 1.02 kg packed
Shape	Highly tapered, close fitting	Classic Spoon shape with room at knees and elbows
Ventilation	3/4-length zip and neck baffle	Thermo Gills for venting without opening the bag
Shell fabric	Recycled Pertex Quantum ripstop with fluorocarbon-free DWR	PET shell
Sleep position	Best for back and stomach sleepers	Built for side sleepers
Packed size	9 in wide, waterproof roll-top compression sack	Stuff sack included

Specs compared

Spec	Rab Neutrino 400 Sleeping Bag	NEMO Disco 30 Sleeping Bag
Color	Nightfall Blue	Chimera, Ombre Blue
Temperature Rating	-7C	30℉
Care Instructions	Store it away uncompressed to help keep its loft	Send it back to NEMO (for 100% recyclability)
Closure Type	Zip (left)	Zipper
Size	Long, Regular, Wide	Regular, Long
Count	1	1
Item Weight	895 g / 31.6 oz (Long Wide)	2 lb 4 oz / 1.02 kg (Packed Weight)
Fill Type	Down, Goose down	Down
Fill Power	800FP	650 FP
Material Type	Recycled Pertex Quantum outer	PET (shell)
Material Certifications	Nikwax fluorocarbon-free hydrophobic finish	RDS-certified
Age Group	Adult	Adult

Show all 21 specs

Spec	Rab Neutrino 400 Sleeping Bag	NEMO Disco 30 Sleeping Bag
Occasion	Mountain missions, Mountaineering	Camping
Typical Users	Outdoor Enthusiasts	Side sleepers, Backpackers, Campers
Organic	No	No
Shape	Highly tapered design	Classic Spoon® silhouette, Spoon® shape
Design Highlights	Hood, Adjustable neck baffle, Stuff sack	Thermo Gills, Draft collar, Pillow pocket, Stuf…
Length	230 cm (Long), 90.6 in (Long)	6'6" / 198 cm (Fits Up To)
Width	9 in (packed size)	64 in / 163 cm (shoulder girth)
Pattern Type	ripstop	—
Fit Style	Close fitting (adjustable neck baffle design)

Rab Neutrino 400 Sleeping Bag vs NEMO Disco 30 Sleeping Bag

Prices

Rab Neutrino 400 Sleeping Bag vs NEMO Disco 30 Sleeping Bag

Prices

NEMO Disco 30 Sleeping Bag

What separates them

Price history

Prices at every store