Katadyn BeFree AC Water Filter (0.5L) vs Platypus GravityWorks 4L
Weight and specs compared for 2026 — and which one to choose.
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 AC Water Filter (0.5L) vs Platypus GravityWorks 4L: which should you buy?
If saving weight is your priority, the Katadyn BeFree AC Water Filter (0.5L) wins — at 72 g it is 91 g (56%) lighter than the Platypus GravityWorks 4L (163 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.