Hollow fiber membrane water filters can remove harmful substances in lakes and streams, making them safe and clean drinking water. It can filter without chemicals, iodine or batteries, and the operation is simple and fast. It can filter up to 2000 liters of water, with a filtration accuracy of 0.01 µm and a fast flow rate of up to 1100 ml/min. Comfortable and edible silicone nozzle and leak-proof cap, you can use it safely outdoors. Very suitable for travel, outdoor adventures, emergency preparedness, hiking, backpacking, camping, and survival.