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Arc'teryx Proton 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 — 90 g lighter than the Arc'teryx Proton LT Hoody (32% less weight). If grams matter to you, that is the one to beat.
Arc'teryx Proton LT Hoody
285 g
Synthetic insulated hoody with excellent moisture management.
Full details →Montbell Ex Light Down Jacket
195 g
900-fill ultralight down jacket in minimal packable design.
Full details →Arc'teryx Proton 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 90 g (32%) lighter than the Arc'teryx Proton LT Hoody (285 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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