Good product delivered very quickly I recommend
Excellent filters for backpacking! I have ordered and used these filters before -- they do work. I really appreciate that they screw on to a soda bottle or platypus water bladder. Did not initiate communication with seller, but did receive a notification that these were in my local bank area for final delivery. Good seller!
Essential for any emergency kit as well as for hiking out in the wild country. People who get lost survive if they can find healthy water to drink. Unfortunately most sources of untreated water contain harmful bacteria and parasites. This filter can literally be the difference between life and death.