Zpacks Arc Haul Ultra 50L vs Zpacks Arc Haul Ultra 60L Backpack
Weight and specs compared for 2026 — and which one to choose.
Ultralight thru-hiking pack with carbon fiber frame and Dyneema Composite Hybrid fabric. Features roll-top closure and adjustable torso fit.
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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Zpacks Arc Haul Ultra 50L vs Zpacks Arc Haul Ultra 60L Backpack: which should you buy?
If saving weight is your priority, the Zpacks Arc Haul Ultra 50L wins — at 606 g it is 18 g (3%) lighter than the Zpacks Arc Haul Ultra 60L Backpack (624 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.