This replacement element fits Katadyn Hiker, Hiker Pro and and older PUR Hiker water filters. Includes field maintenance kit with cleanable filter protector to extend cartridge life. Features 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 Includes field maintenance kit with cleanable filter protector to extend cartridge life in challenging conditions To clean filter protector, simply swish it in the water Replacement element works with Hiker Pro, Hiker and older PUR Hiker filters