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Hyperlite Mountain Gear Aero 28 Ultralight Fastpack vs Mountain Hardwear Alakazam 45L ALUULA Graflyte

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

Hyperlite Mountain Gear Aero 28 Ultralight Fastpack is the lighter option — 314 g lighter than the Mountain Hardwear Alakazam 45L ALUULA Graflyte (38% less weight). If grams matter to you, that is the one to beat.
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Spec Hyperlite Mountain Gear Aero 28 Ultralight Fastpack Mountain Hardwear Alakazam 45L ALUULA Graflyte
Weight 506 g · 0.506 kg · 1.12 lb 820 g · 0.820 kg · 1.81 lb
Brand Hyperlite Mountain Gear Mountain Hardwear
Category Backpack Backpack
Hyperlite Mountain Gear Aero 28 Ultralight Fastpack
506 g

Ultralight fastpacking pack with 28L capacity + 8.5L external storage. Dyneema Composite Hybrid construction, vest-style harness, removable hip belt.

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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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Hyperlite Mountain Gear Aero 28 Ultralight Fastpack vs Mountain Hardwear Alakazam 45L ALUULA Graflyte: which should you buy?

If saving weight is your priority, the Hyperlite Mountain Gear Aero 28 Ultralight Fastpack wins — at 506 g it is 314 g (38%) 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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