Durston Kakwa 55 (2025) vs Zpacks Arc Haul Ultra 60L Backpack
Weight and specs compared for 2026 — and which one to choose.
55L ultralight thru-hiking pack in Ultra 200X fabric with tubular aluminum frame, carries up to 20kg comfortably.
Ultralight 60L thru-hiking pack with DCF fabric and arc carbon fiber frame for load transfer. Weight varies by configuration.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Durston Kakwa 55 (2025) vs Zpacks Arc Haul Ultra 60L Backpack: which should you buy?
If saving weight is your priority, the Zpacks Arc Haul Ultra 60L Backpack wins — at 624 g it is 269 g (30%) lighter than the Durston Kakwa 55 (2025) (893 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 backpack page, or browse the full gear weight database.