Product Parameters: Advanced Filtration Level Provides Safe Water - Portable filter can remove 99.9999% of all bacteria and 99.9% of aquatic protozoan parasites under laboratory conditions. Ultra-strong water filtration capacity up to 1600 liters - This water filter has a 0.05 micron ultrafiltration membrane that provides drinking water up to 1600 liters. Considering that carbon fiber and cotton can harbor bacteria after use, the filter can be safely reused with a micron-sized ultrafiltration membrane. Ideal gear for adventure travel, especially outdoor survival - the portable design with metal buckle is enough to use and carry while traveling or outdoor survival without crushing the tube or bag. It is ideal for supplying domestic water during hurricanes, earthquakes or natural disasters. Ideal gear for adventure travel, especially outdoor survival - the portable design with metal buckle is enough to use and carry while traveling or outdoor survival without crushing the tube or bag. It is ideal for supplying domestic water during hurricanes, earthquakes or natural disasters. Spare Water Filters; Water Purifiers; Outdoor Water Purifiers; Straw Water Purifiers; Straw Water Purifiers Water Filters; Portable Straw Water Filters; Portable Water Filters Straw Filters; Purified Water Filters; Water Filtration; Water filter straw