Selection of coffee filters is a vital step in brewing perfect coffee - don't settle for anything less than Bunn quality coffee filters. Using the results of years of research, Bunn manufactures the best filters from high quality, heavy weight paper, so the water flows properly through the coffee. Bunn filters are uniquely designed for strength so the sides are taller, and you don't end up with overflow and grounds in your coffee.. Special paper grade assures optimum extraction of coffee's taste. Perfect for coffees requiring exact brewing, like decaf and flavored coffees. Superior stay-in-place design prevents coffee grounds overflow. Produced using an elemental chlorine-free (ECF) bleaching method. Flat-bottom disposable filter for Bunn coffee brewers