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HydraPak UltraFlask+ 500ml vs Katadyn BeFree 1L

Weight and specs compared for 2026 — and which one to choose.

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec HydraPak UltraFlask+ 500ml Katadyn BeFree 1L
Weight 65 g · 0.065 kg · 0.14 lb
as listed
 63 g · 0.063 kg · 0.14 lb
as listed (BeFree 1.0L, article 8018006)
Brand HydraPak Katadyn
Category Hygiene Hygiene
HydraPak UltraFlask+ 500ml
65 g

Compressible 500ml soft flask with an integrated fast-flow filter cap. Built for trail running, fastpacking and on-the-move filtering from hydration vests.

See it in your base weight → Full details →
Katadyn BeFree 1L
63 g

Lightweight collapsible water filter bottle. 1L per minute.

See it in your base weight → Full details →

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HydraPak UltraFlask+ 500ml vs Katadyn BeFree 1L: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest hygiene page, or browse the full gear weight database.

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