Exotac Ferrocerium Rod Ultra Light vs Katadyn BeFree Water Filter
Weight and specs compared for 2026 — and which one to choose.
Ultralight fire starter at 79g. 3/8 inch x 4 inch rod rated for 15,000+ strikes, perfect for emergency kits.
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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Exotac Ferrocerium Rod Ultra Light vs Katadyn BeFree Water Filter: which should you buy?
If saving weight is your priority, the Katadyn BeFree Water Filter wins — at 65 g it is 14 g (18%) lighter than the Exotac Ferrocerium Rod Ultra Light (79 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.