A box of 50 white filter papers which perfectly fit a Kalita Wave Dripper. Available in both 185 and 155 sizes, The flat bottomed design of these filters is intended to aid a more even extraction compared to conical filters in which the water moves more slowly through the bottom. The wave of the filter wall holds the brewing coffee away from the wall of the device which limits the amount of heat loss. As with all paper filters, ensure you rinse them first to both remove any paper taste and pre-warm your device and vessel.