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Gossamer Gear Gorilla 40 vs Hyperlite Mountain Gear Unbound 40

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

Gossamer Gear Gorilla 40 is the lighter option — 179 g lighter than the Hyperlite Mountain Gear Unbound 40 (22% less weight). If grams matter to you, that is the one to beat.
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Spec Gossamer Gear Gorilla 40 Hyperlite Mountain Gear Unbound 40
Weight 651 g · 0.651 kg · 1.44 lb 830 g · 0.830 kg · 1.83 lb
Brand Gossamer Gear Hyperlite Mountain Gear
Category Backpack Backpack
Gossamer Gear Gorilla 40
651 g

Lightweight 40L weekend pack with internal frame.

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Hyperlite Mountain Gear Unbound 40
830 g

40L Dyneema Composite Hybrid pack with internal frame and waterproof roll-top closure. Built for alpine and storm-prone conditions.

Full details →

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Gossamer Gear Gorilla 40 vs Hyperlite Mountain Gear Unbound 40: which should you buy?

If saving weight is your priority, the Gossamer Gear Gorilla 40 wins — at 651 g it is 179 g (22%) lighter than the Hyperlite Mountain Gear Unbound 40 (830 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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