What it is: A convenient, high-value duo of brush heads for the Clarisonic® Cleansing System. What it does: Perfect for exfoliating skin, shaving prep, and for use on the décolleté and body, these brush heads do it all. All Clarisonic brush heads are made from a nonporous, soft elastomeric material, resistant to bacterial attachment. All brush heads are precision-designed to oscillate bi-directionally at a sonic frequency. This set contains: 2 x Brush Heads. What else you need to know: Replace your Clarisonic brush head every 90 days. We cannot guarantee the efficacy, durability, or long term impact on the device itself, of brush heads not engineered by Clarisonic.