Hydrapak 42mm Filter Cap – a convenient water filtration solution that allows you to drink clean water straight from your bottle. Just screw the filter cap onto a compatible bottle and hydrate on the go – no need for extra containers or steps.

Technical specifications:

• Thread compatibility: 42mm – fits Hydrapak Seeker, Stow 1L, and other 42mm bottles
• Filtration technology: Hollow fiber membrane
• Use: For filtering water from natural sources like rivers, lakes, and streams
• Flow rate: Up to 1 L/min
• Removes: >99.99% of bacteria and protozoa (e.g., Giardia, E. coli, Cryptosporidium)
• Filter lifespan: Up to 1000 liters (depending on water quality)
• Included: 42mm filter cap with protective cover
• Weight: Approx. 57 g

Perfect for hiking, trail running, bikepacking, travel, and emergency preparedness. Screw it on, filter, and drink – it’s that simple.