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Hyperlite Mountain Gear Southwest 55 vs Zpacks Arc Haul Ultra 60L Backpack
Weight and specs compared for 2026 — and which one to choose.
Zpacks Arc Haul Ultra 60L Backpack is the lighter option — 56 g lighter than the Hyperlite Mountain Gear Southwest 55 (8% less weight). If grams matter to you, that is the one to beat.
Hyperlite Mountain Gear Southwest 55
680 g
Ultralight Dyneema 55L pack for serious gram-counters.
Full details →Zpacks Arc Haul Ultra 60L Backpack
624 g
Ultralight 60L thru-hiking pack with DCF fabric and arc carbon fiber frame for load transfer. Weight varies by configuration.
Check price Full details →Hyperlite Mountain Gear Southwest 55 vs Zpacks Arc Haul Ultra 60L Backpack: which should you buy?
If saving weight is your priority, the Zpacks Arc Haul Ultra 60L Backpack wins — at 624 g it is 56 g (8%) 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.
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