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Black Diamond Speed 40 vs Gossamer Gear Mirage 40L Pack ALUULA

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

Gossamer Gear Mirage 40L Pack ALUULA is the lighter option — 631 g lighter than the Black Diamond Speed 40 (53% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Speed 40 Gossamer Gear Mirage 40L Pack ALUULA
Weight 1,180 g · 1.180 kg · 2.60 lb 549 g · 0.549 kg · 1.21 lb
Brand Black Diamond Gossamer Gear
Category Backpack Backpack
Black Diamond Speed 40
1,180 g

Lightweight 40L alpine pack with removable framesheet.

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Gossamer Gear Mirage 40L Pack ALUULA
549 g

Lightest framed 40L backpack, 19.4oz, ALUULA Graflyte V52 ultra-lightweight fabric

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Black Diamond Speed 40 vs Gossamer Gear Mirage 40L Pack ALUULA: which should you buy?

If saving weight is your priority, the Gossamer Gear Mirage 40L Pack ALUULA wins — at 549 g it is 631 g (53%) lighter than the Black Diamond Speed 40 (1,180 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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