Arc'teryx Atom Jacket vs Rab Mythic Ultra Jacket
Weight and specs compared for 2026 — and which one to choose.
Insulated mid-layer with Coreloft Compact synthetic fill and stretch panels. PFAS-free DWR finish (2025). Versatile for active use in cold wet conditions.
Check price Full details →Premium ultralight down jacket with 900FP hydrophobic down and TILT zoned insulation in a lightweight Atmos shell, built for cold alpine conditions.
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Arc'teryx Atom Jacket vs Rab Mythic Ultra Jacket: which should you buy?
If saving weight is your priority, the Arc'teryx Atom Jacket wins — at 355 g it is 182 g (34%) lighter than the Rab Mythic Ultra Jacket (537 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.