Dermatologist developed. Sonic movement offers deep yet gentle cleansing. Two bristle types for targeted cleansing in hard-to-reach, contoured areas of the face where dirt hides. Waterproof. Swiss engineered. For all skin types. Use once daily for 30 seconds. Build up to 1 minute, twice daily. To use: - Apply cleanser to moistened skin or brush head. - Massage in circular motion for 15 seconds on cheeks using white bristles. - Massage in up-and-down motion for 15 seconds on T-Zone using green br