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UltraFlask™ 42 mm Filter Cap

UltraFlask™ 42 mm Filter Cap

$109.99
$109.99
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Tax included. Shipping calculated at checkout.

Run fast and filter faster with the UltraFlask™ + Filter Cap, designed to seamlessly thread onto HydraPak’s 42 mm running flasks and handhelds. Offering a lightweight and easy filtration solution, it features a traditional bite valve and cap design, allowing runners to drink freshly filtered water* directly through the high-flow Blaster valve.

Perfect for trail runners and endurance athletes, the UltraFlask™ + Filter Cap combines lightweight convenience with effective water filtration, so you can stay hydrated without slowing down.

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

  • FAST & SAFE FILTRATION
    Removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from up to 1,500 litres of water at a rate of >1 L per minute.*
  • LIGHT & COMPACT
    Minimalist design and lightweight materials make it an ideal filtration choice for runners, adding no extra bulk whether stored or threaded directly onto a flask.
  • HIGH-FLOW DESIGN
    The Blaster bite valve auto-seals after every sip, ensuring a smooth drinking experience without leaks or drips.
  • 42 mm THREAD COMPATIBILITY
    Fits easily onto HydraPak’s running soft flasks, flexible bottles, and other water storage containers with a 42 mm thread.
  • INCLUDED BACKFLUSH ADAPTER
    Restore flow rate by backflushing the filter using a HydraPak Stow or a clean water bottle, ensuring long-lasting performance.

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

Diameter: 42 mm
Weight: 36 g
Length: 115 mm
Materials: ABS, POM, Silicone, Hollow Fibre

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