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ULA Ohm 2.0 vs Zpacks Arc Haul Ultra 50L
Weight and specs compared for 2026 — and which one to choose.
ULA Ohm 2.0 is the lighter option — 39 g lighter than the Zpacks Arc Haul Ultra 50L (6% less weight). If grams matter to you, that is the one to beat.
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.
Check price Full details →ULA Ohm 2.0 vs Zpacks Arc Haul Ultra 50L: which should you buy?
If saving weight is your priority, the ULA Ohm 2.0 wins — at 567 g it is 39 g (6%) lighter than the Zpacks Arc Haul Ultra 50L (606 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.