The BMC cotton sports air filters are made with a process called "Full Molding" which allows the characteristic red filter to be obtained from a single molding without requiring gluing in the corners, which causes easy breakage. The particular rubber used in BMC filtration systems is practically non-deformable over time and has excellent adhesion characteristics to any form of airbox. It is produced with high-performance materials that allow an increase in air flow to the engine compared to the original paper or sponge air filter, while guaranteeing superior filtration efficiency: thanks to the combination of the different oiled layers, the containment of all impurities is guaranteed up to a minimum of 7 microns (ISO5011 international standard certification for filtration), while OEM pape.