The Simota high flow air filter is designed to reduce intake restriction and made to maximize airflow. This filter is made with non-woven fabric and can be used with or without oil! Also, the air filter is very light and is made with a one-piece extrusion molded rubber compound frame that will not separate under extreme conditions. With a 200x200 mesh, dust absorption will be very efficient and will help prolong the life of your vehicle. The huge walls suck in as much air as possible. This Simota unit is one of the best air filters you can get for your Honda PCX125.