Outdoor Water Purification Straw is super light weight and convenient straw type outdoor water purifier. It can purify river water, rainwater, lake water and other natural water into direct drinking waterIncludes: water filter straw(7.1 inch x 1.85 inch)x 1, 60mm mountaineering buckle x 1, 18cm telescopic extension tubex 15-Stage Efficient Filtration: The water filter straws removing 99.99999% of harmful substances (contaminants, odors, chlorine, organic chemicals, etc.) to ensure safe, high-quality drinking water and improved taste. Flow rate: 500ml-700ml/min. Filtration accuracy: 0.01µmLong Lifetime: Filter element detachable structure, replaceable filter element to facilitate clean cleaning to extend the life of the second longer service life, longer service life can be filtered 800 gallons(3000L), up to 1300 gallons(5000L).Unopened for long term storage up to 5 yearsUsing high poly iodine and charcoal fiber as the filtration material, the rear 0.01 micron hydrophilic hollow fiber microporous membrane cartridge is connected together with the transparent visual nozzle to make the outdoor drinking water quality visible to the naked eye, so that people can drink water with more peace of mind! Multiple connection usage, can be connected to water bottle & extension tube & water bagScope of use: Outdoor travel, outdoor sports, fitness, camping, life-saving emergency, wild adventure, marching combat, underground mining and other outdoor activities in the field of drinking water is the best choice!