CLARISONIC brush heads are made from a nonporous, soft elastomeric material, resistant to bacterial attachment. All brush heads are precision-designed to oscillate bidirectionally at a sonic frequency. Brand: Clarisonic. Style Name: CLARISONIC Replacement Brush Head for Normal Skin. Style Number: 168579. Available In Stores.;Women > Personal Care Accessories > Bath Accessories;Replacement every 3-4 months recommended;Also ideal for use on the body;Remove brush head and clean weekly with soap and warm water;For best results, replace brush head every three months