Through years of research, BUNN has developed the paramount in coffee filters. Developed from high quality, heavy weight paper, BUNN coffee filters are designed to provide strength in order for no overflow or grounds to exist in your coffee. Each filter is also completely oxygen processed, collaborated with the employment of special paper grades, securing an optimal coffee flavor. Chlorine free and naturally biodegradable, absolutely no formaldehyde is used in the manufacturing of these filters. Each filter is made from 100% virgin pulp and approved by the Federal Food and Drug Administration (FDA). BUNN's supplier does not ship paper to them until they believe it to be completely safe and well below the limit set by the Environmental Protection Agency, guaranteeing unparalleled quality in your order. The quality of your brew will become unmatched upon the application of BUNN's unrivaled filters.