Gossamer Gear Mirage 40 vs Zpacks Arc Haul Ultra 50L
Weight and specs compared for 2026 — and which one to choose.
40L frameless ultralight pack crafted from ALUULA Graflyte fabric, one of the lightest full-featured backpacks available in 2026.
Check price Full details →Ultralight thru-hiking pack with carbon fiber frame and Dyneema Composite Hybrid fabric. Features roll-top closure and adjustable torso fit.
Check price Full details →Gossamer Gear Mirage 40 vs Zpacks Arc Haul Ultra 50L: which should you buy?
If saving weight is your priority, the Gossamer Gear Mirage 40 wins — at 550 g it is 56 g (9%) lighter than the Zpacks Arc Haul Ultra 50L (606 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.