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Durston Gear Kakwa 40 vs Osprey Levity 45

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

Durston Gear Kakwa 40 is the lighter option — 5 g lighter than the Osprey Levity 45 (1% less weight). If grams matter to you, that is the one to beat.
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Spec Durston Gear Kakwa 40 Osprey Levity 45
Weight 795 g · 0.795 kg · 1.75 lb 800 g · 0.800 kg · 1.76 lb
Brand Durston Gear Osprey
Category Backpack Backpack
Durston Gear Kakwa 40
795 g

Ultralight 40L internal-frame thru-hiking pack in Ultra 200X fabric, with a hollow aluminum U-frame and 15L of external storage.

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Osprey Levity 45
800 g

Ultralight 45L pack at 800g. Designed for minimalist backpackers with Nanofly ripstop and Lightwire frame.

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Durston Gear Kakwa 40 vs Osprey Levity 45: which should you buy?

If saving weight is your priority, the Durston Gear Kakwa 40 wins — at 795 g it is 5 g (1%) lighter than the Osprey Levity 45 (800 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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