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Gossamer Gear Mariposa 60 vs Zpacks Arc Blast 55L

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

Zpacks Arc Blast 55L is the lighter option — 167 g lighter than the Gossamer Gear Mariposa 60 (27% less weight). If grams matter to you, that is the one to beat.
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Spec Gossamer Gear Mariposa 60 Zpacks Arc Blast 55L
Weight 617 g · 0.617 kg · 1.36 lb 450 g · 0.450 kg · 0.99 lb
Brand Gossamer Gear Zpacks
Category Backpack Backpack
Gossamer Gear Mariposa 60
617 g

Ultralight 60L frameless pack with sit pad back panel.

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Zpacks Arc Blast 55L
450 g

Frameless Dyneema pack with excellent load carry for its weight.

Full details →

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Gossamer Gear Mariposa 60 vs Zpacks Arc Blast 55L: which should you buy?

If saving weight is your priority, the Zpacks Arc Blast 55L wins — at 450 g it is 167 g (27%) lighter than the Gossamer Gear Mariposa 60 (617 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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