Hydrapak 42mm Filter Cap

Filter water anytime, anywhere. The new 42mm filter cap seamlessly screws onto all sizes of HydraPak's 42mm threaded Seeker reservoirs and Flux flexible water bottles, transforming them into filtration solutions. The result is a lightweight filtration system that allows you to squeeze filtered drinking water into other camping bottles and containers, or drink freshly filtered water directly from your Seeker, Flux, UltraFlask, or SkyFlask. It's a quick and easy way to treat your water, whether you're at camp or on the go.

*Effective against common waterborne bacteria such as E. coli (99.999%) and parasitic cysts (99.9999%) based on HSF 42.

• Size: 42 mm
• Materials: PP/POM, EPDM, silicone, hollow fiber
• Note: Avoid freezing the filter. Freezing may damage the hollow fiber membrane. If you are in a freezing environment, we recommend that you keep the filter in your pocket or close to your body to prevent freezing.
• Fast and safe filtration: Removes 99.99% of E. coli and parasite cysts. Filters approximately 1,500 liters of fresh water at a rate of >1 liter per minute.
• Dust cover and large flow nozzle: Protect the beverage nozzle from dust and dirt. Quickly open and close with one hand, avoiding dirty hands from touching the nozzle directly.
• Lightweight and compact: At only 57g, our filters are among the lightest on the market. Whether stored or mounted directly on your Seeker or Flux, they take up no extra space.
• Compatible with 42mm threads: Thread the filter onto the most popular backpacking reservoirs, soft flasks, and flow bottles, including Seeker reservoirs, Flux bottles, UltraFlasks, and SkyFlask handhelds.