Hyperlite Mountain Gear Southwest 40L Backpack vs Zpacks Nero Pro Ultralight Backpack 30L
Weight and specs compared for 2026 — and which one to choose.
Fully waterproof Dyneema Composite Hybrid pack with aluminum stays and foam back panel. Built for off-trail use in harsh conditions. 29.7 oz.
Full details →Sub-one-pound waterproof frameless pack, 16oz, seam-taped Ultra fabric body
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Hyperlite Mountain Gear Southwest 40L Backpack vs Zpacks Nero Pro Ultralight Backpack 30L: which should you buy?
If saving weight is your priority, the Zpacks Nero Pro Ultralight Backpack 30L wins — at 455 g it is 386 g (46%) lighter than the Hyperlite Mountain Gear Southwest 40L Backpack (841 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.