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Mountain Hardwear Alakazam 45L ALUULA Graflyte vs Zpacks Arc Blast 55L

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

Zpacks Arc Blast 55L is the lighter option — 370 g lighter than the Mountain Hardwear Alakazam 45L ALUULA Graflyte (45% less weight). If grams matter to you, that is the one to beat.
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Spec Mountain Hardwear Alakazam 45L ALUULA Graflyte Zpacks Arc Blast 55L
Weight 820 g · 0.820 kg · 1.81 lb 450 g · 0.450 kg · 0.99 lb
Brand Mountain Hardwear Zpacks
Category Backpack Backpack
Mountain Hardwear Alakazam 45L ALUULA Graflyte
820 g

Spring 2026 framed ultralight pack in new ALUULA fabric; one of first mainstream packs with this material

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Zpacks Arc Blast 55L
450 g

Frameless Dyneema pack with excellent load carry for its weight.

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Mountain Hardwear Alakazam 45L ALUULA Graflyte 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 370 g (45%) lighter than the Mountain Hardwear Alakazam 45L ALUULA Graflyte (820 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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