BikeMaster’s air filters for the Honda CBR250R have a precision woven 304# stainless steel outer construction. With triple layer protection, they increase air flow over stock filters. The filters are corrosion resistant, environmentally friendly, and are washable and reusable. With more than 100 applications, the BikeMaster air filters are a quality aftermarket product that goes above and beyond the OEM, according to the company. The MSRP is $59.95.