<!--ProdInc[170095206]/Mall:[rei_US]--> Updated design with horizontal slots for improved flow of water through the filter This cartridge restores your compatible Grayl filter to a 8-second (5 liters per minute) press time for clean drinking water virtually anywhere on earth Compatible with the 24 fl. oz. Grayl GeoPress filter and purifier bottle Cartridge is rated for 350 cycles (65 gal./250 L); when press time reaches 25 sec. (or 3 years have elapsed since first use), it''s time to replace it Unused purifier cartridge has a shelf life of 10 years when stored in proper airtight conditions Cartridge uses ion exchange and ultra-powdered activated carbon to filter and purify water Removes viruses (e.g., hepatitis A, norovirus, rotavirus), bacteria (e.g., E. coli, salmonella, shigella) and protozoan cysts (e.g., amoebae, cryptosporidia, giardia) Adsorbs many chemicals, pesticides, herbicides, heavy metals, volatile organic compounds (VOCs), flavors and odors Filters particulates such as sediment and microplastics Independently tested by a certified laboratory to meet or exceed NSF/ANSI protocols 42 and 53 for sediment, pathogen and chemical removal Also meets the EPA Guide Standard and Protocol for testing microbiological water purifiersImported. Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Travel</p><!--]--></td></tr><!--]--></table>