Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting...

https://www.list-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-unlike-rf

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting gradual lifting over 3 to 6 months. Compared to RF, which heats skin at 40 to 45°C mainly for surface tightening, Ultherapy goes deeper for longer-lasting results