Arc'teryx Cerium LT Hoody vs Rab Cirrus Flex 2.0 Jacket

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

Arc'teryx Cerium LT Hoody is the lighter option — 5 g lighter than the Rab Cirrus Flex 2.0 Jacket (2% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Cerium LT Hoody	Rab Cirrus Flex 2.0 Jacket
Weight	290 g · 0.290 kg · 0.64 lb	295 g · 0.295 kg · 0.65 lb
Brand	Arc'teryx	Rab
Category	Clothing - Mid Layer	Clothing - Mid Layer

Arc'teryx Cerium LT Hoody

290 g

Lightweight 750-fill down hoody for cold belay sessions.

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Rab Cirrus Flex 2.0 Jacket

295 g

Synthetic insulated jacket for damp conditions.

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Arc'teryx Cerium LT Hoody vs Rab Cirrus Flex 2.0 Jacket: which should you buy?

If saving weight is your priority, the Arc'teryx Cerium LT Hoody wins — at 290 g it is 5 g (2%) lighter than the Rab Cirrus Flex 2.0 Jacket (295 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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