Black Diamond Beta Light 45L vs Gossamer Gear Mariposa 60L Backpack
Weight and specs compared for 2026 — and which one to choose.
Lightweight 45-liter backpack designed for alpine and minimalist backpacking. Can be stripped to 650g by removing hip belt and internal stays.
Full details →Versatile ultralight pack with internal frame and removable foam back panel. 60L capacity ideal for multi-day thru-hikes with loads up to 35 lbs.
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Black Diamond Beta Light 45L vs Gossamer Gear Mariposa 60L Backpack: which should you buy?
If saving weight is your priority, the Black Diamond Beta Light 45L wins — at 890 g it is 80 g (8%) lighter than the Gossamer Gear Mariposa 60L Backpack (970 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.