Katadyn BeFree AC Bottle 0.5L vs MSR Thru-Link Inline Microfilter
Weight and specs compared for 2026 — and which one to choose.
Ultralight collapsible water filter bottle with activated carbon. Removes tannins and improves taste. Fits running vests and ultralight daypacks
Inline 0.2-micron hollow-fiber filter with activated carbon that integrates into hydration reservoirs for on-the-move filtering.
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Katadyn BeFree AC Bottle 0.5L vs MSR Thru-Link Inline Microfilter: which should you buy?
If saving weight is your priority, the MSR Thru-Link Inline Microfilter wins — at 70 g it is 2 g (3%) lighter than the Katadyn BeFree AC Bottle 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.