Our Replacement Brush Heads are made from a non-porous, super soft filament which is resistant to attracting bacteria. | CPSIA compliant, FDA and OEHHA Prop 65 approved Sonimart facial cleansing brush heads are made according to the highest health and safety standards | Sensitive brush heads (black) are precision designed for effective use on the face, décolletage and body for sensitive skin types. | Deep cleaning brush heads (blue) are precision desgined to cleanse deep into your pores to remove impurities and reduce oil and blemishes