Katadyn is a Swiss company and the global Number One when it comes to individualized water purification systems and products. They have been developing water filters, chlorine- and silver-based sterilization agents and mobile desalinators for travel, outdoor, camping and marine applications since 1928. Numerous armed forces and relief organisations around the world use our products for survival and life-saving. The smallest and lightest water filter available! Fits in coat pocket or waist pack. Exclusive silver impregnated ceramic prohibits bacterial growth and lasts up to 2000 gallons. Cleanable 0.2 micron element removes bacteria and cysts such as Giardia and Cryptosporidium. 30” input hose, cleaning brush, measuring gauge all contained within the body of the filter. Ideal for travel and day hiking. Wt. 8oz., Ht. 7”. Includes prefilter, bottle clip, cleaning pad and zippered carry case.