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Six Moon Designs Fusion 55 vs Six Moon Designs Swift X

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Six Moon Designs Fusion 55 Six Moon Designs Swift X
Weight 622 g · 0.622 kg · 1.37 lb 765 g · 0.765 kg · 1.69 lb
Brand Six Moon Designs Six Moon Designs
Category Backpack Backpack
Six Moon Designs Fusion 55
622 g

Ultralight 55L frameless Dyneema pack.

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Six Moon Designs Swift X
765 g

Highly configurable 50L ultralight pack with removable stay, hip belt and vest harness options to dial in fit and weight.

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Six Moon Designs Fusion 55 vs Six Moon Designs Swift X: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

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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