Chemex® filters are 20-30% heavier than other filters on the market and remove even the smallest sediment particles as well as unwanted coffee oils and fats. The shape of Chemex filters helps in the proper extraction of coffee through a controlled filtration rate – neither too slow nor too fast. Proper coffee extraction offers a richer flavor by allowing only the desired coffee components to pass into the cup, filtering out every unwanted element. Chemex® filters are designed not to break during coffee preparation or when removing the filter from the coffee maker.