Cold Plasma Plus+ Sub-D/NeckEDITOR'S NOTE This multi tasking powerhouse helps improve the appearance and feel of skin by sculpting, firming and tightening, while contouring the look of the jawline and neck areas. Perricone MD Cold Plasma Plus+ Sub D Neck targets and improves the appearance of lines, wrinkles, uneven texture, sagging and crepiness, while smoothing skin and improving the feel of skin's elasticity.