Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your...

https://wiki-planet.win/index.php/Ultherapy_vs_Standard_HIFU_%E2%80%93_What_Did_the_2024_Study_Say%3F

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your skin, promoting a natural lift over 3 to 6 months