Run fast and filter faster with the HydraPak 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.

HydraPak Ultraflask 42 mm Filter Cap Features:

• 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

HydraPak Ultraflask 42 mm Filter Cap Specifications:

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