The HyperFlow Microfilter utilizes the latest hollow fiber technology and our most advanced techniques to package water purification in an incredibly small, easy-to-use format. This opens up entirely new possibilities for exploring the wilderness. With its ergonomic shape, tiny size, and tool-free maintenance, this filter is suitable for day trips as well as multi-day expeditions. With a filtration rate of 3 liters per minute, it is the most efficient microfilter ever. Also included is a Quick Connect bottle adapter for direct connection to all MSR drinking systems and various other containers with large openings, as well as a modern pre-filter that extends the life of the filter.