Feature： 【3-STAGE FILTRATION】:0.1 microns pore size Hollow fibers,5 microns Activated carbon,0.2 microns pp cotton, advanced 3-stage filtration to remove heavy metal, organic, rubber mass, harmful minerals and another soluble salt from water. 1. Hollow Fiber Membrane: 0.1-micron pore size. Removes 99.999999% of bacteria, 99.999% of protozoa, and 99.999% of Microplastics 2. Carbon Fiber Capsule: improves taste while reducing lead, other heavy metals, chlorine and organic chemical matter (pesticides, herbicides, VOC) 3. PP Cotton: 0.2-micron terminal filtration, reduce activated carbon powder leakage, ensure turbidity of the water, ensure water safety 【HIGH CAPACITY】：Filters up to 5000 liters (1320gallons) of contaminated water without iodine, chlorine, or other chemicals; Filter connect with gravity water bag, does not require batteries, and has no moving parts 【GRAVITY FILTER】：Pour water in the top and clean water comes out the bottom; Comes in a sealed bag, perfect for storing for emergencies 【FOOD GRADE MATERIAL】:Equipped with 3L food grade TPU water storage bag, the straw can be linked with the equipped water bag or beverage bottle to facilitate drinking water for many people.