HIGH-EFFICIENT 5-STAGE FILTRATION SYSTEM. The EGW - Maya uses a single five filter cartridge that contains a unique blend of Calcium Sulphite Activated Carbon Filter, Beads and Catalytic KDF Media to removes all categories of water contamination. Its ultrafiltration purification process is able to remove particles as small as 0.01 micron. This means the EGW - Maya filter can PROTECT YOU against waterborne parasites intestinal cysts and bacteria that cause health problems.