MSR HyperFlow Backcountry Water Filter

High flow rate allows you to pump more than 3 liters/minute or one liter every 20 strokes Hollow Fiber filter meets NSF Protocol P231 for the removal of 99.9999% of bacteria and 99.9% of protozoa from beginning to the end of filter life in 'worst-case' water Ultralight and compact design makes it easy to bring on every adventure, even when space is at a premium Quick Connect bottle adapter conveniently lets you filter water directly into a variety of containers, including all MSR hydration products and other wide-mouth bottles Filter is easily field maintained to keep a high flow rate throughout the life of the cartridge. Field maintenance kits for seals and replacement cartridges available separately