Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound, encouraging...

https://www.bookmark-xray.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-making-it

Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound, encouraging collagen over 3 to 6 months for natural lift. RF heats skin to 40-45°C for surface tightening but doesn't reach as deep