The New Acne Clarifying Collection. Previously available only through select dermatologists, now available in prestige retailers. Armed with patented sonic technology and two speeds, the Mia 2 cleansing system works with the plush Acne Cleansing Brush Head to gently flush pores and remove impurities from skin. The Acne Clarifying Collection: the future of acne has never been clearer.. Safe for use on acne-prone skin. Extra-plush bristle gradation delivers concentrated flushing of the pores. Velvet-like bristle tips are uniquely textured to provide an ultra-gentle cleansing action on sensitive, compromised skin. Fits on any Clarisonic® Skin Cleansing system. Recommended replacement every 3 months Includes two Acne Cleansing Brush Heads.