The MSR TrailShot Pocket-Sized Water Filter is an essential tool for trail runners, hikers, and fast-packers who require lightweight and efficient water treatment. Designed for one-handed operation, it filters directly from sources into bottles or hydration bladders. The system utilizes hollow fiber technology to remove 99.9999% of bacteria, 99.9% of protozoa, and particulates, meeting U.S. EPA drinking water standards and NSF protocol P231. Technical Specifications - Weight: 142g (5 oz). Flow Rate: 1 liter per minute. Filter Pore Size: 0.2 microns. Cartridge Life: Approximately 2,000 liters. Dimensions: 15.25 x 6.1 cm. Key Features: Field-cleanable via shaking, compatible with a wide range of vessel openings, and requires no setup time.