The white paper filters are specially designed to fit the Kalita Wave flat bottom coffee filter. The Kalita Wave filters are the best filters you will try, but they do require a simple rinse before you start filtering. Made from the highest quality paper. Perfectly shaped to ensure a high quality brew. Corrugated paper filters with a flat bottom. Designed for use with the Kalita 155 dripper or the elegant Kalita Wave coffee filter. Pack of 50 paper filters.