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

https://wiki-site.win/index.php/Is_Ultherapy_Really_Different_from_HIFU_in_Singapore%3F

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for deep tissue lifting, with results peaking around 3 to 6 months