Zpacks Arc Blast 55L vs Zpacks Super Nero Ultra 50L Backpack
Weight and specs compared for 2026 — and which one to choose.
Frameless Dyneema pack with excellent load carry for its weight.
Versatile ultralight frameless pack in Dyneema Composite Fabric. Sized for multi-day thru-hiking trips while staying under 350g total weight.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Zpacks Arc Blast 55L vs Zpacks Super Nero Ultra 50L Backpack: which should you buy?
If saving weight is your priority, the Zpacks Super Nero Ultra 50L Backpack wins — at 345 g it is 235 g (41%) lighter than the Zpacks Arc Blast 55L (580 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.