These filters are designed to remove even the finest grit and "fines" from your cup. This results in an exceptionally clean, smooth brew compared to French press or metal filters. Total Immersion Compatibility: Because the AeroPress uses a total immersion process, these filters are thick enough to hold back the water during the steep but porous enough to allow for a quick, even flow when pressure is applied. Laughing Buddha Head Office Thulo Bharyang Chowk, KTM, 9818991514/P. 015370279