GRAYL Legend Trail Water Filter Removes 99.99% of bacteria (e.g. E. coli) and 99.94% of protozoan cysts (e.g. Giardia, Crypto) Filters many chemicals (e.g. chlorine, iodine) and heavy metals (e.g. lead, arsenic) Suitable for most outdoor water sources; perfect for hiking, camping, kayaking, and canoeing Produces 16oz of clean fresh water in just 15 seconds (2 liters/minute) without the use of chemicals Replaceable TRAIL Filter lasts 300 uses (40 gal / 150 l)