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Arc'teryx Atom LT 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 — 123 g lighter than the Arc'teryx Atom LT Hoody (39% less weight). If grams matter to you, that is the one to beat.
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Spec Arc'teryx Atom LT Hoody Montbell Ex Light Down Jacket
Weight 318 g · 0.318 kg · 0.70 lb 195 g · 0.195 kg · 0.43 lb
Brand Arc'teryx Montbell
Category Clothing - Mid Layer Clothing - Mid Layer
Arc'teryx Atom LT Hoody
318 g

Coreloft insulated hoody with excellent breathability.

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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 Atom LT 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 123 g (39%) lighter than the Arc'teryx Atom LT Hoody (318 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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