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Marmot Hydrogen 30°F vs Nemo Disco 15°F

Weight and specs compared for 2026 — and which one to choose.

Marmot Hydrogen 30°F is the lighter option — 481 g lighter than the Nemo Disco 15°F (40% less weight). If grams matter to you, that is the one to beat.
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Spec Marmot Hydrogen 30°F Nemo Disco 15°F
Weight 709 g · 0.709 kg · 1.56 lb 1,190 g · 1.190 kg · 2.62 lb
Brand Marmot Nemo
Category Sleep System Sleep System
Marmot Hydrogen 30°F
709 g

Ultralight 800-fill down sleeping bag rated to 30°F.

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Nemo Disco 15°F
1,190 g

Spoon-shaped sleeping bag for side sleepers. 650-fill down.

Full details →

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Marmot Hydrogen 30°F vs Nemo Disco 15°F: which should you buy?

If saving weight is your priority, the Marmot Hydrogen 30°F wins — at 709 g it is 481 g (40%) lighter than the Nemo Disco 15°F (1,190 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

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