Katadyn Hiker Pro Hand Pump Water Filter for Backpacking, Camping, Emergency SurvivalCAMPING, BACKPACKING & SURVIVAL WATER FILTER: AntiClogTM, 0. 2 micron glass fiber filter reliably removes 99. 9999% of bacteria, 99. 9% of protozoa, cysts, algae, spores, and sediments from clear to muddy water. An active carbon core reduces unpleasant tastes and odors. EASY TO CLEAN IN THE FIELD: Unlike other water filter systems, the Hiker Pro can be cleaned while camping, backpacking, hiking, or for survival in an emergency. Simply remove the