Convenience is everything when family camping at the beach, or rafting for days down the Colorado River. The Katadyn Base Camp Water Filter offers an accessible way to treat large volumes of water. No pumping is required. Just fill the water bag and hang; gravity is your friend. The Base Camp Filter uses the cleanable Hiker PRO cartridge, which contains a pleated glass fiber element that removes bacteria, protozoa and cysts from the drinking water.