Zpacks Arc Haul Ultra 50L vs Zpacks Arc Haul Ultra 60
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 carbon fiber frame and Ultra 100X Dyneema fabric. Seam-taped roll-top design with side water bottle pockets.
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 60: which should you buy?
If saving weight is your priority, the Zpacks Arc Haul Ultra 50L wins — at 606 g it is 12 g (2%) lighter than the Zpacks Arc Haul Ultra 60 (618 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.