Filtration SystemOutdoor personal water filter straw can protect against 99.99 percent of aquatic bacteria, 99.99 percent of waterborne protozoa parasites and 99.99 percent of microparticles, silt, sand, cloudiness and odour. Improve the water taste. Filter CapacityThe camping water purifier can filter up to 378,000 liters (100,000 gallons) of sewage into safe drinking water, 0.1 Micron absolute hollow fiber membrane filter, the flow rate is about 800ml or min. Ultralight and DurableThis portable mini water filter straw is 13.8x4 cm and weighs 0.11 lb (52 g) , ideal for camping, climbing, hiking, backpacking and other outdoor adventures. Built out of food-grade BPA-free ABS material, safe and durable. Easy to OperateAttaches to a drinking pouch, a standard disposable water bottle(28mm bottleneck), a hydration pack, or use the straw to drink directly from the rivers, streams, lakes. After that use the syringe to backwash it. Package ContentsCamping Water filter, extension straw, water bag, syringe.