Red Paw Packs Flatiron 28L vs Zpacks Arc Haul Ultra 60
Weight and specs compared for 2026 — and which one to choose.
Handmade ultralight frameless fastpack perfect for trail running and fast hiking. Minimalist design with clean lines. Customizable materials allow weight reduct...
Full details →Ultralight 60L thru-hiking pack with carbon fiber frame and Ultra 100X Dyneema fabric. Seam-taped roll-top design with side water bottle pockets.
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Red Paw Packs Flatiron 28L vs Zpacks Arc Haul Ultra 60: which should you buy?
If saving weight is your priority, the Red Paw Packs Flatiron 28L wins — at 368 g it is 250 g (40%) lighter than the Zpacks Arc Haul Ultra 60 (618 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.