Arc'teryx Atom Hoody vs Arc'teryx Proton LT Hoody
Weight and specs compared for 2026 — and which one to choose.
Versatile synthetic insulated hoody with Coreloft Compact insulation. Excellent moisture resistance and packability; ideal as standalone or layering piece.
Synthetic insulated hoody with excellent moisture management.
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Arc'teryx Atom 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 70 g (20%) lighter than the Arc'teryx Atom Hoody (355 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.