1、The hollow fiber ultrafiltration membrane has a large flow rate. Using the straw drinking method, it will filter out the sundries in the water as the water flows into the mouth. 2、0.01 micron filter can physically remove 99.99% of harmful substances and 99.99% of protozoa. 3、The pre‑filter can effectively removes rust, mud and other contaminants, providing cleaner water. 4、Integrated design of quick drinking and backwashing brings an excellent drinking experience during outdoor activities and emergency use. 5、With a water bag, you can directly insert the filter tube into the water source, or you can use this water bag, which is very convenient to use. 1 x Water Filter Bag1 x Water Filter Pipe1 x Filter3 x Cotton Piece1 x Water Bag Quick Connector1 x Expansion Pipe Joint1 x Manual  Item Type: Water Filter Straw Product Material: ABS + SiliconeFilter Material: Carbon Fiber + Ultrafiltration MembraneProduct Color: As Pictures Shown Product Weight: Approx. 170g / 6.0ozFiltration Life: 2000 LitersFlow Rate: 1100ML/minApplicable Water Source: River water, lake water, stream water, ground water, rain water, surface water and other fresh water without chemical pollution