Katadyn Guide Microfilter:
If you hike or climb with big groups in the summer, the Katadyn Guide Microfilter is an essential for every outing. It features a large, easy-grip T-shape handle with a high output pump that filters 1.5 liters per minute, the fastest rate for any microfilter currently available. The large pleated filter features an activated carbon core (minimizes bad flavors) that moves high volumes of liquid at low, easy-pumping pressures. Outside the pleated filter is a special removable filter that helps extend cartridge life by blocking larger clogging impurities. Depending on water quality, the Guide Microfilter cartridge will purify up to 200 gallons before required replacement.