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NEMO Disco 30 Sleeping Bag vs Marmot Hydrogen 30 Sleeping Bag

The Marmot Hydrogen 30 is the lighter, warmer-for-its-weight bag, with 800 fill power down in a trim mummy cut. The NEMO Disco 30 is the roomier, more comfortable choice, with its Spoon shape, Thermo Gills and draft collar that suit side sleepers. Reviewers praise the Hydrogen's warmth-to-weight and packability, while Disco owners like the extra shoulder and hip room and the venting. Pick the Hydrogen for fast, light trips and the Disco for comfort on the ground.

  • Choose the NEMO Disco 30 if you sleep on your side or move around at night and want shoulder and hip room plus venting you can open without unzipping the bag.
  • Choose the Marmot Hydrogen 30 if you want the lightest, most packable 30°F down bag and sleep fine in a close-fitting mummy.

Prices

  • NEMO Disco 30 Sleeping Bag: $167.93 at REI (last seen Nov 10)
  • Marmot Hydrogen 30 Sleeping Bag: $364.65 at CampSaver.com (checked today)
  • Difference: the NEMO Disco 30 Sleeping Bag is $196.72 cheaper than the Marmot Hydrogen 30 Sleeping Bag at the latest prices (Nov 10 and Nov 12)
NEMO
NEMO Disco 30 Sleeping Bag

NEMO Disco 30 Sleeping Bag

$167.93at REIChecked Nov 10
See all prices and details
Visit REI
Pros
  • Spoon shape gives side sleepers room to bend knees and roll over
  • Thermo Gills vent heat on mild nights without unzipping
  • Draft collar and 3D footbox keep warmth in at the neck and feet
  • Pillow pocket holds a camp pillow in place
  • Recyclable through NEMO's take-back program
Cons
  • Heavier packed weight than the Hydrogen
  • 650 fill power is lower-grade down for the weight
  • Bulky Spoon cut packs larger
  • No water-resistant shell treatment listed
Marmot
Marmot Hydrogen 30 Sleeping Bag

Marmot Hydrogen 30 Sleeping Bag

$364.65at CampSaver.comChecked 2 h ago
See all prices and details
Visit CampSaver.com
Pros
  • Very light for a 30°F down bag
  • 800 fill power down packs small
  • Water-resistant shell handles condensation and drizzle
  • Trim mummy cut is efficient at trapping heat
  • Internal pocket for small items
Cons
  • Mummy cut feels tight for side sleepers and rollers
  • No venting beyond the main zipper
  • Less shoulder and hip room
  • Fewer comfort features like a pillow pocket or draft collar

What separates them

NEMO Disco 30 Sleeping BagMarmot Hydrogen 30 Sleeping Bag
ShapeClassic Spoon silhouette, wider at shoulders and hipsMummy cut, tapered and close-fitting
Fill power650 fill power RDS-certified down800 fill power down
Packed weight2 lb 4 ozAbout 1 lb
VentingThermo Gills let you dump heat without opening the main zipStandard full-length zip only
Sleep positionBuilt for side sleepers and restless sleepersBest for back and stomach sleepers who stay still
Water resistancePET shell, no water-resistant treatment listedWater-resistant shell
Extra featuresDraft collar, pillow pocket, 3D footbox, stuff sackStuff sack and internal pocket
End of lifeCan be sent back to NEMO for recyclingNo take-back program listed

Price history

$336.08$167.93
Nov 6Nov 13
  • NEMO Disco 30 Sleeping Bag: lowest $167.93 on Nov 11 at REI; $299.95 on Nov 13.
  • Marmot Hydrogen 30 Sleeping Bag: lowest $336.08 on Nov 13 at BananaFingers.

Prices at every store

NEMO Disco 30 Sleeping Bag

  • REINew

    In stock

    $167.93Free shippingChecked Nov 10
    Visit REI
  • Backcountry.comNew

    In stock

    $209.96Free shippingChecked Nov 10
    Visit Backcountry.com
  • Moto Camp NerdNew

    In stock

    $209.97Free shippingChecked Nov 10
    Visit Moto Camp Nerd
  • Bill & Paul's SporthausNew

    Availability unknown

    $209.99Free shippingChecked Nov 10
    Visit Bill & Paul's Sporthaus
All 13 stores and price history →

Marmot Hydrogen 30 Sleeping Bag

  • EpicTVNew

    In stockShips from abroad · duties may apply

    $336.08+ $21.90 shippingChecked 2 h ago
    Visit EpicTV
  • BananaFingersNew

    In stockShips from abroad · duties may apply

    $336.08+ $22.00 shippingChecked 2 h ago
    Visit BananaFingers
  • CampSaver.comNew

    In stock

    $364.65Free shippingChecked 2 h ago
    Visit CampSaver.com
  • OliunìdNew

    In stockShips from abroad · duties may apply

    $336.08+ $63.00 shippingChecked 2 h ago
    Visit Oliunìd
All 10 stores and price history →

Specs compared

SpecNEMO Disco 30 Sleeping BagMarmot Hydrogen 30 Sleeping Bag
Temperature Rating30℉30° F
Fill Power650 FP800 fill power
ShapeClassic Spoon® silhouette, Spoon® shapeMummy
ColorChimera, Ombre Blue—
Care InstructionsSend it back to NEMO (for 100% recyclability)—
Closure TypeZipper—
SizeRegular, Long—
Count1—
Item Weight2 lb 4 oz / 1.02 kg (Packed Weight)—
Fill TypeDown—
Material TypePET (shell)—
Material CertificationsRDS-certified—
Show all 24 specsShow fewer specs
SpecNEMO Disco 30 Sleeping BagMarmot Hydrogen 30 Sleeping Bag
Age GroupAdult—
OccasionCamping—
Typical UsersSide sleepers, Backpackers, Campers—
OrganicNo—
Design HighlightsThermo Gills, Draft collar, Pillow pocket, Stuf…—
Length6'6" / 198 cm (Fits Up To)—
Width64 in / 163 cm (shoulder girth)—
With Pocket—Yes
With Stuff Sack—Yes
Department

What reviewers say

NEMO Disco 30 Sleeping Bag

Owners of the Disco line generally like the roomy Spoon cut and call it comfortable for side sleeping, with the Thermo Gills getting credit for extending the bag into warmer nights. Complaints tend to focus on weight and packed size for the temperature rating, and some find the 30°F rating optimistic at the cold end.

What people mention
  • Fit and roomPraisedSide sleepers say the wider shoulders and knees let them bend their legs without fighting the bag.
  • WeightCriticisedOwners note the bag is heavier and bulkier packed than ultralight quilts rated for the same temperature.
  • Warmth ratingMixedMost find it fine for three-season use, but cold sleepers say 30°F is optimistic.
  • Thermo GillsPraisedThe vented gills are called useful for warm nights when a full bag is too much.

Marmot Hydrogen 30 Sleeping Bag

Owners praise the Hydrogen 30 as a genuinely light bag that packs small and keeps them comfortable on summer trips. Most criticism centers on the snug fit and on the rating being optimistic once temperatures drop toward freezing.

What people mention
  • WeightPraisedOwners say it disappears in the pack and barely adds weight on long days.
  • Packed sizePraisedReviewers note it compresses small enough for a minimal overnight setup.
  • FitCriticisedSeveral owners find the mummy cut tight across the shoulders and hips.
  • Warmth ratingMixedSome say it is comfortable in mild nights but not at the 30°F limit.

Questions and answers

Which is better for side sleepers?
The NEMO Disco 30. Its Spoon shape is wider at the shoulders and hips, so you can bend your knees and roll over without the bag twisting. The Hydrogen's mummy cut is tighter and suits back and stomach sleepers better.
Which bag is warmer for its weight?
The Marmot Hydrogen 30. It uses 800 fill power down at roughly a pound, so it traps more warmth per ounce. The Disco uses 650 fill power and weighs over twice as much packed, though its draft collar and footbox help close the gap.
Which packs smaller?
The Hydrogen 30. Higher fill power down and a mummy cut compress into a smaller stuff sack. The Disco's roomier Spoon shape and lower fill power take up more pack space.
Is the Disco 30 worth stepping up to over the Hydrogen?
If comfort and room to move matter more than weight, yes. The Disco adds venting, a draft collar and a pillow pocket. If you count ounces and sleep still, the Hydrogen is the better bag.
Which handles damp conditions better?
The Hydrogen 30, which has a water-resistant shell. The Disco's PET shell has no water-resistant treatment listed, so keep it dry and use a liner or cover in wet weather.
Do both fit tall sleepers?
The Disco 30 comes in Regular and Long, with the Long fitting up to 6'6". Check the Hydrogen's size options before buying if you are tall, since its mummy cut leaves less room to stretch.

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Men's / Unisex
Water Resistant—Yes
Weight—1 lb heavy