Arc'teryx Cerium Hoody vs Montbell Ex Light Down Jacket

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

Montbell Ex Light Down Jacket is the lighter option — 54 g lighter than the Arc'teryx Cerium Hoody (22% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Cerium Hoody	Montbell Ex Light Down Jacket
Weight	249 g · 0.249 kg · 0.55 lb	195 g · 0.195 kg · 0.43 lb
Brand	Arc'teryx	Montbell
Category	Clothing - Mid Layer	Clothing - Mid Layer

Arc'teryx Cerium Hoody

249 g

Lightweight down insulation hoody with 850-fill-power responsible down. Packable and warm with streamlined fit for layering.

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Montbell Ex Light Down Jacket

195 g

900-fill ultralight down jacket in minimal packable design.

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Arc'teryx Cerium Hoody vs Montbell Ex Light Down Jacket: which should you buy?

If saving weight is your priority, the Montbell Ex Light Down Jacket wins — at 195 g it is 54 g (22%) lighter than the Arc'teryx Cerium Hoody (249 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 clothing - mid layer page, or browse the full gear weight database.

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