Vario FilterPerfect for a small group, the award winning Katadyn Vario is a powerful companion in a small, lightweight package. This variable filter offers higher output or longer life, your choice! In the outdoors, you need a water filter for all conditions clear or dirty water, the award winning Katadyn Vario is adjustable to different conditions. The filter eliminates bacteria, protozoa, cysts, algae, spores and sediments. Reduces chemicals and improves taste