Hyperlite Mountain Gear Southwest 40 vs Zpacks Arc Haul Ultra 60L Backpack
Weight and specs compared for 2026 — and which one to choose.
Bombproof DCF frameless backpack built for off-trail travel. 40L capacity with roll-top closure and durable Dyneema fabric for all-weather adventures.
Full details →Ultralight 60L thru-hiking pack with DCF fabric and arc carbon fiber frame for load transfer. Weight varies by configuration.
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Hyperlite Mountain Gear Southwest 40 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 173 g (22%) lighter than the Hyperlite Mountain Gear Southwest 40 (797 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.