HydraPak Ultraflask 42mm Filter Cap -
HydraPak Ultraflask 42mm Filter Cap -

HydraPak Ultraflask 42mm Filter Cap

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.

Description RRP
HydraPak Ultraflask 42mm Filter Cap $94.99
  • Fast and Safe Filtration Removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from up to 1,500 litres of water at a rate of >1L per minute.*
  • Light and 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