The pocket-sized MSR TrailShot Microfilter is ideal for all trail runners, mountain bikers, and hikers who need to keep their gear as small as possible and rely on quick, easy access to drinking water. The compact filter stands out for its incredibly simple operation and easy maintenance. To filter, simply place the hose into the (dirty) water and squeeze the filter to pump. Clean drinking water can then be directed straight into your mouth, a bottle, or a hydration bladder. To clean, just shake the filter briefly and pump, pack it away, and you're good to go. The TrailShot Microfilter uses state-of-the-art hollow fiber technology to eliminate bacteria, protozoa, and particulates. It has a flow rate of one liter per minute and can filter up to 2,000 liters of water in total.