Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to encourage...

https://www.bookmarking-keys.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-natural

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to encourage gradual collagen tightening, with results peaking around 3 to 6 months