Ultherapy uses ultrasound energy targeting the 4.5 mm SMAS layer to stimulate...
https://www.bookmark-jungle.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-to-lift-and
Ultherapy uses ultrasound energy targeting the 4.5 mm SMAS layer to stimulate collagen deep under the skin, with results peaking around 3 to 6 months