For pumping and filtering a supply of water on the trail or during emergencies, the Katadyn Hiker Pro is an all-conditions filter that is efficient, lightweight, and reliable. The 0.2 micron microfilter protects against harmful bacteria & protazoa (like Giardia and Cryptosporidium). The core of the filter contains activated carbon to improve the taste and reduce chemicals from your water. A removable filter protector extends cartridge life in challenging conditions and quick-connect fittings make installation and removal of input and output hoses easy. The Hiker Pro also allows direct attachment to 1/4" drink tube of hydration packs so you can refill quickly and be on your way.