Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer deep under...

https://www.bookmark-maker.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-a

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer deep under the skin, promoting gradual lifting and tightening with results peaking around 3 to 6 months