Arc'teryx Cerium SL Down Jacket vs PAKA Mayu Ultralight Jacket
Weight and specs compared for 2026 — and which one to choose.
Ultralight down jacket at 8.3 ounces with exceptional packability.
Full details →50% alpaca fiber insulation, 3.8 oz lighter than traditional Nano Puff jackets.
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Arc'teryx Cerium SL Down Jacket vs PAKA Mayu Ultralight Jacket: which should you buy?
If saving weight is your priority, the Arc'teryx Cerium SL Down Jacket wins — at 235 g it is 26 g (10%) lighter than the PAKA Mayu Ultralight Jacket (261 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.