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

https://wiki-quicky.win/index.php/What_Does_%22Operator-Dependent%22_Mean_for_Ultherapy_Results%3F

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