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Zpacks Arc Haul Ultra 40L vs Zpacks Arc Scout 37L

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Zpacks Arc Haul Ultra 40L Zpacks Arc Scout 37L
Weight 597 g · 0.597 kg · 1.32 lb
as listed in product header; size/torso variant not stated on page
 390 g · 0.390 kg · 0.86 lb
Brand Zpacks Zpacks
Category Backpack Backpack
Zpacks Arc Haul Ultra 40L
597 g

Dyneema 40L pack at 540g. Compact version of Arc Haul for minimalist backpacking setups.

See it in your base weight → Full details →
Zpacks Arc Scout 37L
390 g

Compact Dyneema frameless pack for lightweight overnighters.

See it in your base weight → Full details →

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Zpacks Arc Haul Ultra 40L vs Zpacks Arc Scout 37L: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

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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