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Arc'teryx Cerium SL Down Jacket vs Arc'teryx Proton LT Hoody

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

Arc'teryx Cerium SL Down Jacket is the lighter option — 50 g lighter than the Arc'teryx Proton LT Hoody (18% less weight). If grams matter to you, that is the one to beat.
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Spec Arc'teryx Cerium SL Down Jacket Arc'teryx Proton LT Hoody
Weight 235 g · 0.235 kg · 0.52 lb 285 g · 0.285 kg · 0.63 lb
Brand Arc'teryx Arc'teryx
Category Clothing - Mid Layer Clothing - Mid Layer
Arc'teryx Cerium SL Down Jacket
235 g

Ultralight down jacket at 8.3 ounces with exceptional packability.

Full details →
Arc'teryx Proton LT Hoody
285 g

Synthetic insulated hoody with excellent moisture management.

Full details →

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Arc'teryx Cerium SL Down Jacket vs Arc'teryx Proton LT Hoody: which should you buy?

If saving weight is your priority, the Arc'teryx Cerium SL Down Jacket wins — at 235 g it is 50 g (18%) 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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