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Black Diamond Speed 40 vs Osprey Kestrel 68

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

Black Diamond Speed 40 is the lighter option — 550 g lighter than the Osprey Kestrel 68 (32% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Speed 40 Osprey Kestrel 68
Weight 1,180 g · 1.180 kg · 2.60 lb 1,730 g · 1.730 kg · 3.81 lb
Brand Black Diamond Osprey
Category Backpack Backpack
Black Diamond Speed 40
1,180 g

Lightweight 40L alpine pack with removable framesheet.

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Osprey Kestrel 68
1,730 g

Extended journey 68L pack with top-loader design.

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Black Diamond Speed 40 vs Osprey Kestrel 68: which should you buy?

If saving weight is your priority, the Black Diamond Speed 40 wins — at 1,180 g it is 550 g (32%) lighter than the Osprey Kestrel 68 (1,730 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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