Emergency Water Filter System. Removes 99.9% of harmful Cryptosporidium, Giardia and other pathogens. The activated carbon reduces waterborne chemicals and improves water taste. Weighs less than 1 oz. Ideal for hiking, traveling and emergency preparedness. A perfect addition to an emergency kit. Filters up to 30 gallons. Easily slips into day pack, waist pack or travel luggage. Useful as a back up on multi-day backpacking trips. Provides the ability to drink directly from any water bottle, cap or directly from water sources. Hang packaged.