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Hyperlite Mountain Gear Aero 28 vs ULA Catalyst

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

Hyperlite Mountain Gear Aero 28 is the lighter option — 314 g lighter than the ULA Catalyst (37% less weight). If grams matter to you, that is the one to beat.
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Spec Hyperlite Mountain Gear Aero 28 ULA Catalyst
Weight 536 g · 0.536 kg · 1.18 lb 850 g · 0.850 kg · 1.87 lb
Brand Hyperlite Mountain Gear ULA
Category Backpack Backpack
Hyperlite Mountain Gear Aero 28
536 g

Ultralight 28L fastpack with vest-strap harness. Perfect for fast-and-light adventures and trail running.

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ULA Catalyst
850 g

Versatile 68L semi-frameless pack for loaded trips.

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Hyperlite Mountain Gear Aero 28 vs ULA Catalyst: which should you buy?

If saving weight is your priority, the Hyperlite Mountain Gear Aero 28 wins — at 536 g it is 314 g (37%) lighter than the ULA Catalyst (850 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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