This treatment is another revolutionary Cold Plasma product from Perricone MD that has been shown to help reduce the appearance of a double chin & sagging skin under the jaw line. The first of its kind, Sub-D offers treatment specifically targeted for the delicate area of the neck & chin to help address the loss of elasticity & improve the appearance of wrinkles & redundant skin on the neck. The result is a noticeably firmer, chiselled appearance of the chin, jaw line & neck.