Black Diamond Beta Light 30L vs WATERFLY Hiking Backpack 20L
Weight and specs compared for 2026 — and which one to choose.
Ultralight roll-top backpack with stripped-down design. Removable hip belt and frame stays reduce weight to 452g for minimalist adventures.
20-litre daypack with two stretch bottle pockets, a hydration sleeve and hose port, trekking-pole attachments, a padded 15.6" laptop sleeve and a cross-style hi...
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Black Diamond Beta Light 30L vs WATERFLY Hiking Backpack 20L: which should you buy?
The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.
See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.