Hyperlite Mountain Gear Aero 28 vs Hyperlite Mountain Gear Southwest 55
Weight and specs compared for 2026 — and which one to choose.
Ultralight 28L fastpack with vest-strap harness. Perfect for fast-and-light adventures and trail running.
Full details →Ultralight Dyneema 55L pack for serious gram-counters.
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Hyperlite Mountain Gear Aero 28 vs Hyperlite Mountain Gear Southwest 55: which should you buy?
If saving weight is your priority, the Hyperlite Mountain Gear Aero 28 wins — at 536 g it is 144 g (21%) lighter than the Hyperlite Mountain Gear Southwest 55 (680 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.