Gossamer Gear Mariposa 60 vs Outdoor Vitals CS40 Ultra
Weight and specs compared for 2026 — and which one to choose.
Ultralight 60L frameless pack with sit pad back panel.
Full details →Ultralight 40L backpack built for ultralight hiking and thru-hiking. Features innovative weight-saving construction that carries 20x its weight.
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Gossamer Gear Mariposa 60 vs Outdoor Vitals CS40 Ultra: which should you buy?
If saving weight is your priority, the Gossamer Gear Mariposa 60 wins — at 617 g it is 148 g (19%) lighter than the Outdoor Vitals CS40 Ultra (765 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.