1 2

Ultraflask 42mm Filter Cap

Ultraflask 42mm Filter Cap

$99.99
$99.99
Sale Sold out
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.

  • 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

View full details