Bonded pre-folded circle shaped bleached filters ensure uniform extraction for pure coffee flavour. The thicker specialty fibre filter design keeps bitter elements, oils, and grounds in their place (and out of your cup). Chemex filters are 20-30% heavier than other filters and remove even the finest sediment particles. The design of the filter facilitates the proper infusion time by regulating the filtration rate - about a 4 minute brew. They produce coffee with clarity, complexity, and with a light body. One warning: As the filters are made of heavy paper, they require a full rinse with hot water before brewing to remove any paper taste.