Clarisonic's replacement brush head is specifically designed - and color-coded - for sensitive, acne-prone skin. Extra plush bristles gently flush out pores, helping to prevent breakouts and promote a clear, healthy complexion. - Compatible with all Clarisonic facial cleansing devices -Instructions for use: - Align notches with pins on device handle, push down and twist clockwise to attach- For best results, replace brush heads every three months