Clean water equals good health. It may not be that simple, but contaminated water can have a detrimental impact on the fun aspect of any bike trip. One solution, for the adventurous off-roader or overland biker, is the Katadyn Combi Water Pump Filter. With its ceramic depth filtration, the filter “eliminates bacteria, protozoa, cysts, algae, spores, sediments and viruses in combination with particles greater than 0.2 microns. Also reduces chemicals.” So most of the nasty stuff is removed. The pump weighs 580 grams and its active carbon element treats up to 400 litres of water.