This Personal Water Filter features a combination of a sediment prefilter, a 0.01 micron membrane filter straw, and activated carbon fiber. It effectively removes all visible solid sediments and reduces 99.99999% of harmful substances while improving the odor, ensuring the safest water even in the most challenging environments. With a capacity guaranteed to filter 4000L (1,000 gallons), this faucet-mounted compatible filter provides a dependable clean water solution. It includes a universal PET bottle adapter, a BPA-free reusable pouch, and a 2.0 ft (60cm) food-grade silicone pipe. An essential addition to any survival bag, this water filter straw is the basic disaster tool for preparedness and reliable access to potable water.