$averPak 2 Pack - Includes 2 Blue Seychelle Extreme Replacement Filters for the 20oz Water Filter Bottle Includes 2 - EXTREME Filters for use in the Seychelle 20oz Sports Bottles (Blue). Each filter produces up to 100 gallons of filtered water, which equals approximately 1,067 12oz bottles of bottled water. Filters are easily replaced or exchanged. Provides an exceptional solution for situations when bacteria, viruses and/or Nuclear/Radiologic contaminants may be present. Requires a MODERATE DRAW pressure for drinking. EXTREME Filter includes an iodinated resin and has been proven effective in the removal of bacteria and viruses to six logs (99.9999%). Plus it removes up to 99.99% of Radiological Contaminants such as Gross Beta, Radon 222, Alpha Radium 226, Plutonium, Uranium, Cesium 134 and 137. It can be used in extreme conditions, including for turbid and stagnant water and is ideal when using water of an unknown quality. For emergency preparedness, when survival is threatened by disaster. Removes up to 99.99% of contaminants and pollutants found in fresh water supplies including Aesthetics such as chlorine, Sediment and dirt; Chemicals (VOC's) such as DDT, MTBE, Benzene, Chloroforms (THM's); Dissolved Solids (heavy metals) such as Arsenic, Lead, Mercury, Copper, Zinc, Aluminum, Chromium 6 and up to 99.9% of Biologicals (pathogens) such as Giardia and Cryptosporidium. BPA Free and Will Not Leach. Designed for quick and easy replacement of or exchange between filters, which allows you to change the filter to perfectly fit your current filtration needs. To change or exchange filters, simply remove the top, as you would when filling it with water, screw out the existing filter, replace it with the new one and put the top back on. It's that easy!