Arc'teryx Cerium LT Hoody vs Arc'teryx Proton LT Hoody

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

Arc'teryx Proton LT Hoody is the lighter option — 5 g lighter than the Arc'teryx Cerium LT Hoody (2% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Cerium LT Hoody	Arc'teryx Proton LT Hoody
Weight	290 g · 0.290 kg · 0.64 lb	285 g · 0.285 kg · 0.63 lb
Brand	Arc'teryx	Arc'teryx
Category	Clothing - Mid Layer	Clothing - Mid Layer

Arc'teryx Cerium LT Hoody

290 g

Lightweight 750-fill down hoody for cold belay sessions.

Full details →

Arc'teryx Proton LT Hoody

285 g

Synthetic insulated hoody with excellent moisture management.

Full details →

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

If saving weight is your priority, the Arc'teryx Proton LT Hoody wins — at 285 g it is 5 g (2%) lighter than the Arc'teryx Cerium LT Hoody (290 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.

More clothing - mid layer comparisons

Arc'teryx Cerium LT Hoody vs LGT Balaclava Arc'teryx Cerium LT Hoody vs Senchi Designs A90 Half-Zip Hoodie Arc'teryx Cerium LT Hoody vs Black Diamond Deploy Down Jacket Arc'teryx Cerium LT Hoody vs Montbell Plasma 1000 Down Jacket Arc'teryx Cerium LT Hoody vs Montbell Ex Light Down Jacket Arc'teryx Cerium LT Hoody vs The North Face FutureFleece Hoodie