Ultherapy targets the 4.5 mm SMAS layer with focused ultrasound, promoting...

https://donovansultimatewords.nexorafield.com/posts/is-ultherapy-safe-around-nerves-and-bone-because-of-imaging

Ultherapy targets the 4.5 mm SMAS layer with focused ultrasound, promoting collagen over 3 to 6 months for gradual lifting. Compared to RF, which heats skin to 40-45°C mainly for surface tightening, Ultherapy reaches deeper layers