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Zpacks Arc Haul Ultra 50L vs Zpacks Arc Haul Ultra 60

Weight and specs compared for 2026 — and which one to choose.

Zpacks Arc Haul Ultra 50L is the lighter option — 12 g lighter than the Zpacks Arc Haul Ultra 60 (2% less weight). If grams matter to you, that is the one to beat.
Spec Zpacks Arc Haul Ultra 50L Zpacks Arc Haul Ultra 60
Weight 606 g · 0.606 kg · 1.34 lb 618 g · 0.618 kg · 1.36 lb
Brand Zpacks Zpacks
Category Backpack Backpack
Zpacks Arc Haul Ultra 50L
606 g

Ultralight thru-hiking pack with carbon fiber frame and Dyneema Composite Hybrid fabric. Features roll-top closure and adjustable torso fit.

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Zpacks Arc Haul Ultra 60
618 g

Ultralight 60L thru-hiking pack with carbon fiber frame and Ultra 100X Dyneema fabric. Seam-taped roll-top design with side water bottle pockets.

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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.

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