HydraPak 42MM Filter Cap

You see a filter. We see a lightweight, streamlined filter that ensures clean drinking water is never in short supply.
Filter water on the go. The new 42MM Filter Cap threads seamlessly onto all sizes of HydraPak’s 42MM threaded run flasks, Seekers, and Flux flexible bottles morphing them into filtration solutions.
LIGHT & COMPACT: At only 57 grams, our filter is one of the lightest filter options available. Its small size takes up no extra space when stored or threaded directly onto a Seeker or Flux.
DUST COVER & HIGH-FLOW NOZZLE: Keeps dust off your drink nozzle. Quickly opens and closes the drink nozzle with one hand without any direct contact with dirty hands.
42MM THREAD COMPATIBLE: Easily thread the filter onto some of the most popular backpacking water storage bags and flexible bottles including the HydraPak Running Flasks; Seeker 2L, 3L, 4L, and 6L; and the Flux 750ML, 1L, and 1.5L
FAST & SAFE FILTRATION: Removes 99.99% of E Coli & Parasitic cysts. Filters approximately 1,500 liters of fresh water at a rate greater than 1 L per minute.
SAFE: Filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia (99.9%) from approximately 1,500 liters of water.
SAFE & RELIABLE: 100% BPA and PVC Free
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