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Gossamer Gear Gorilla 40 vs ULA Catalyst

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

Gossamer Gear Gorilla 40 is the lighter option — 199 g lighter than the ULA Catalyst (23% less weight). If grams matter to you, that is the one to beat.
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Spec Gossamer Gear Gorilla 40 ULA Catalyst
Weight 651 g · 0.651 kg · 1.44 lb 850 g · 0.850 kg · 1.87 lb
Brand Gossamer Gear ULA
Category Backpack Backpack
Gossamer Gear Gorilla 40
651 g

Lightweight 40L weekend pack with internal frame.

Full details →
ULA Catalyst
850 g

Versatile 68L semi-frameless pack for loaded trips.

Full details →

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Gossamer Gear Gorilla 40 vs ULA Catalyst: which should you buy?

If saving weight is your priority, the Gossamer Gear Gorilla 40 wins — at 651 g it is 199 g (23%) lighter than the ULA Catalyst (850 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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