Gossamer Gear Gorilla 40 vs Zpacks Arc Haul Ultra 60L Backpack

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

Zpacks Arc Haul Ultra 60L Backpack is the lighter option — 27 g lighter than the Gossamer Gear Gorilla 40 (4% less weight). If grams matter to you, that is the one to beat.

Spec	Gossamer Gear Gorilla 40	Zpacks Arc Haul Ultra 60L Backpack
Weight	651 g · 0.651 kg · 1.44 lb	624 g · 0.624 kg · 1.38 lb
Brand	Gossamer Gear	Zpacks
Category	Backpack	Backpack

Gossamer Gear Gorilla 40

651 g

Lightweight 40L weekend pack with internal frame.

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Zpacks Arc Haul Ultra 60L Backpack

624 g

Ultralight 60L thru-hiking pack with DCF fabric and arc carbon fiber frame for load transfer. Weight varies by configuration.

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Gossamer Gear Gorilla 40 vs Zpacks Arc Haul Ultra 60L Backpack: which should you buy?

If saving weight is your priority, the Zpacks Arc Haul Ultra 60L Backpack wins — at 624 g it is 27 g (4%) lighter than the Gossamer Gear Gorilla 40 (651 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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