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

https://www.bookmarking-fox.win/ultherapy-uses-focused-ultrasound-to-reach-the-4-5-mm-smas-layer-which

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