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

https://wiki-coast.win/index.php/Does_Ultherapy_Hurt_and_What_Affects_Comfort%3F

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