Arc'teryx Atom Jacket vs Marmot Featherless Hoody

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

Arc'teryx Atom Jacket is the lighter option — 15 g lighter than the Marmot Featherless Hoody (4% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Atom Jacket	Marmot Featherless Hoody
Weight	355 g · 0.355 kg · 0.78 lb	370 g · 0.370 kg · 0.82 lb
Brand	Arc'teryx	Marmot
Category	Clothing - Mid Layer	Clothing - Mid Layer

Arc'teryx Atom Jacket

355 g

Insulated mid-layer with Coreloft Compact synthetic fill and stretch panels. PFAS-free DWR finish (2025). Versatile for active use in cold wet conditions.

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Marmot Featherless Hoody

370 g

Synthetic insulated hoody that retains warmth when wet.

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Arc'teryx Atom Jacket vs Marmot Featherless Hoody: which should you buy?

If saving weight is your priority, the Arc'teryx Atom Jacket wins — at 355 g it is 15 g (4%) lighter than the Marmot Featherless Hoody (370 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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