HydraPak UltraFlask+ Filter Cap

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Run fast, filter faster. The UltraFlask+ Filter Cap threads seamlessly onto all of HydraPak’s 42mm running flasks and handhelds for a lightweight, straightforward filtration solution. Featuring a traditional bite valve and cap design, runners can drink freshly filtered water directly through the high-flow Blaster valve.

FAST & SAFE FILTRATION
The integrated filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from approximately 1,500 liters of water at a rate of >1L per minute.*

LIGHT AND COMPACT
Minimal design and lightweight materials make this filter the ideal choice for runners. It takes up no extra space when stored or threaded directly onto a flask.

HIGH-FLOW
Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.

42MM THREAD COMPATIBLE
Easily thread the filter onto some of the most popular running softflasks, flexible bottles and water storage containers.

INCLUDED BACKFLUSH ADAPTER
Plugs into filter valve and threads onto a HydraPak Stow or bottle of clean water for backflushing the filter to restore its flow rate.

Also check out the combo softlfask and filter kit here.

Replacement bite valves are available here.

*Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42.