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Deuter Speed Lite 20 vs Zpacks Arc Blast 55L
Weight and specs compared for 2026 — and which one to choose.
Deuter Speed Lite 20 is the lighter option — 30 g lighter than the Zpacks Arc Blast 55L (7% less weight). If grams matter to you, that is the one to beat.
Zpacks Arc Blast 55L
450 g
Frameless Dyneema pack with excellent load carry for its weight.
Full details →Deuter Speed Lite 20 vs Zpacks Arc Blast 55L: which should you buy?
If saving weight is your priority, the Deuter Speed Lite 20 wins — at 420 g it is 30 g (7%) lighter than the Zpacks Arc Blast 55L (450 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.