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Marmot Hydrogen 30°F vs Nemo Fillo Elite Wide UL

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

Nemo Fillo Elite Wide UL is the lighter option — 590 g lighter than the Marmot Hydrogen 30°F (83% less weight). If grams matter to you, that is the one to beat.
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Spec Marmot Hydrogen 30°F Nemo Fillo Elite Wide UL
Weight 709 g · 0.709 kg · 1.56 lb 119 g · 0.119 kg · 0.26 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 Fillo Elite Wide UL
119 g

Hybrid inflatable pillow with foam padding. Lightweight comfort at 4.2 oz for multi-day hikes.

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Marmot Hydrogen 30°F vs Nemo Fillo Elite Wide UL: which should you buy?

If saving weight is your priority, the Nemo Fillo Elite Wide UL wins — at 119 g it is 590 g (83%) lighter than the Marmot Hydrogen 30°F (709 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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