Flextail Zero Pump 2 vs Katadyn BeFree Water Filter
Weight and specs compared for 2026 — and which one to choose.
Ultralight pad inflator weighs 0.2 oz less than original with improved threading and sealing.
Full details →Soft collapsible 0.6L bottle with integrated hollow fiber filter. Removes bacteria, parasites, and microplastics at a fast flow rate. Ideal for day hikes and fa...
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Flextail Zero Pump 2 vs Katadyn BeFree Water Filter: which should you buy?
If saving weight is your priority, the Flextail Zero Pump 2 wins — at 57 g it is 8 g (12%) lighter than the Katadyn BeFree Water Filter (65 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 tools page, or browse the full gear weight database.