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Acme Tornado 636 vs Katadyn BeFree AC Water Filter
Weight and specs compared for 2026 — and which one to choose.
Acme Tornado 636 is the lighter option — 53 g lighter than the Katadyn BeFree AC Water Filter (82% less weight). If grams matter to you, that is the one to beat.
Katadyn BeFree AC Water Filter
65 g
0.1-micron hollow fiber filter integrated into a collapsible soft flask. 1,000L lifespan, fast flow rate. New AC version adds activated carbon filtration for im...
Check price Full details →Acme Tornado 636 vs Katadyn BeFree AC Water Filter: which should you buy?
If saving weight is your priority, the Acme Tornado 636 wins — at 12 g it is 53 g (82%) lighter than the Katadyn BeFree AC 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 safety page, or browse the full gear weight database.