Pocket-sized lightweight water filter cleans water on-the-go for hiking, camping, traveling, and emergency preparedness Drink directly from the source or fill a water bottle or hydration pack; easy one-handed operation filters one liter in 60 seconds Ultralight (5 ounces) and compact (6x2.4 inches), it fits in a stash pocket for trail runners, hikers, and mountain bikers Hollow fiber technology allows water to pass through but traps harmful protozoa, like giardia and cryptosporidium, and bacteria, like salmonella Effective against bacteria (99.9999%), protozoa (99.9%) and particulate; filters up to 2,000 liters without iodine, chlorine or other chemicals