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Cumulus Aerial 250 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 — 266 g lighter than the Cumulus Aerial 250 (69% less weight). If grams matter to you, that is the one to beat.
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Spec Cumulus Aerial 250 Nemo Fillo Elite Wide UL
Weight 385 g · 0.385 kg · 0.85 lb 119 g · 0.119 kg · 0.26 lb
Brand Cumulus Nemo
Category Sleep System Sleep System
Cumulus Aerial 250
385 g

Ultralight down sleeping bag with 900 FP goose down, single-layer design with no zipper, perfect for thru-hiking and backpacking.

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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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Cumulus Aerial 250 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 266 g (69%) lighter than the Cumulus Aerial 250 (385 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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