What Makes CHEMEX® Filters Interesting? The cone shape guarantees even extraction for the pure flavor of the coffee. Thicker special fiber filter design (20-30% more than the competition) keeps bitters, oils and bases in place (and out of your cup) • Pre-folded for convenience • Removes impurities, acidity, harmful elements and bitterness from coffee. In your cup, you will find only the caffeine and the desirable aromatic oils of the coffee beans. • Works well with all types of roasts - even tea! Allowing you to make the perfect, purest cup, every time. • The CHEMEX® coffee maker brewing system is a preferred method of roasters and baristas around the world. • Filter paper is made in the USA and uses only USA materials. Harvested responsibly and in compliance with SFI, FSC and PEFC sustainable programs • Compostable and biodegradable • Easy cleaning. No trays, no baskets, just remove the filter and discard.