Katadyn BeFree 1L vs Katadyn BeFree AC Water Filter (0.5L)
Weight and specs compared for 2026 — and which one to choose.
Lightweight collapsible water filter bottle. 1L per minute.
New-for-2025 2-stage filter: 0.1 micron hollow fiber + removable activated carbon. 2L/min flow, 1000L capacity, improved taste.
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Katadyn BeFree 1L vs Katadyn BeFree AC Water Filter (0.5L): which should you buy?
If saving weight is your priority, the Katadyn BeFree 1L wins — at 56 g it is 16 g (22%) lighter than the Katadyn BeFree AC Water Filter (0.5L) (72 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 hygiene page, or browse the full gear weight database.