A lifetime of water at hand. Sawyer's most popular filter just got smaller and lighter. The Sawyer MINI Water Filter is rated to 0.1 micron absolute, weighs only 2 ounces, and filters up to 100,000 gallons! The MINI removes 99.99999% of all bacteria, such as salmonella, cholera and E.coli; removes 99.9999% of all protozoa, such as giardia and cryptosporidium. This award winning system is reliable and easy to use. The MINI can be attached to the included collapsible drinking pouch, inline on a hydration pack, on a standard soda bottle, or simply use the included drinking straw to drink directly from the water source. How is that for versatility? Like all Sawyer filters, a proper backwashing can restore up to 98.5% of the filter's flow rate. That means no expensive cartridges to replace, ever.Specifications and Features: Capacity: 100000 Liter Cleanable Filter: Yes Effective Against Bacteria: Yes Effective Against Particulate: No Effective Against Protozoa: Yes Effective Against Viruses: No Filter Media: Hollow Fiber Filter Type: Gravity