The Sawyer Squeeze Filter is incredibly light, portable, and versatile. Exactly what you need when far off the grid and surrounded by untested water sources. Takes up almost no space in your pack. Great for international travel, too. Rolls up, uses virtually no space in your pack For hiking, camping, hunting, fishing, disasters, travel abroad and more Rated to 0.1 micron absolute filtration Removes 99.99999% of bacteria such as salmonella, cholera, leptospirosis, and e. Coli, and removes 99. 9999% of protozoa such as giardia and cryptosporidiumSystem includes: Squeeze Filter (2) 1L pouches that can be reused hundreds of times Inline adapter Syringe Mesh bag/tubing for a gravity system