HydraPak UltraFlask Filter Cap
Best lightweight filtration solution for long distance trail runners.
Turn any compatible soft flask into a reliable water filtration system. This cap removes common waterborne pathogens while maintaining a high flow rate, making it an essential upgrade for long-distance trail efforts where water sources are plentiful but questionable.
$43.00
at
Running Warehouse
Who it's for
- Trail runners needing lightweight water purification during long mountain races
- Outdoor enthusiasts who already own HydraPak soft-sided water storage gear
- Fast-paced athletes who want quick hydration without breaking their stride
Who should skip it
- Thru-hikers planning multi-month expeditions without access to replacement parts
- Hikers using traditional hard-sided bottles from other major gear brands
- Minimalist campers who prefer gear that requires zero upkeep
Performance breakdown
Filtration Efficiency
Reliably strips bacteria and protozoa from questionable backcountry water sources.
Flow Rate
Delivers water quickly without requiring excessive suction effort while running.
Compatibility
Standard 42mm threading fits most popular soft flasks seamlessly.
Filter Longevity
1,500-liter capacity provides ample filtration for an entire season of trekking.
Ease of Maintenance
Simple design allows for quick cleaning and filter replacement on trail.
Build Durability
Rugged, BPA-free materials withstand the rigors of intense mountain use.
Key Specs
Filter Type
Bottle Filter
Filtration Method
Hollow Fiber Membrane
Filter Lifespan
396 gallons
Flow Rate
1.0 liters per minute
Contaminants Removed
Bacteria, Protozoa
Capacity
0.5 liters
Weight
2.3 ounces
Backwashable
Yes
Material
Silicone, BPA Free Plastic
Power Source
Manual Operation
Know before you buy
Still have a question?
Ask Metto anything about the HydraPak UltraFlask Filter Cap before you decide.
