Designed for Aeropress Coffee Makers, filters all bitterness, grounds, and oil elements of the coffee, leaving in the cup the sweet, silk, and creamy aftertaste of the Specialty Coffee. The package contains 350 filters, which will last for many months to come. The filters are fully biodegradable and compostable, and for this reason, you can throw along with the used coffee from the Aeropress Coffee maker.