Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep,...

https://www.bookmark-jungle.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-a-key

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep, collagen-building lift with results peaking around 3 to 6 months. Compared to RF, which heats skin to 40-45°C for surface tightening, Ultherapy reaches deeper tissues