The lightweight and easy to use design makes the Katadyn Hiker a great choice for all-around use. Filter physically removes particles, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, cryptosporidium and others. Glass-fiber element is pleated for increased surface area to handle silt and muddy water. Activated-carbon core adsorbs chemicals and pesticides to improve taste of water. Pre-filter at hose inlet filters to 150 microns, removing larger contaminants before they reach the main filter to increase its life span. Quick-connect adapter sends the filtered water directly into your hydration pack or Nalgene reservoir (both sold separately).