Ultherapy targets the 4.5 mm SMAS layer using focused ultrasound, lifting and...

https://zulu-wiki.win/index.php/How_Do_I_Choose_Between_Tightening_and_Lifting_for_My_Neck%3F

Ultherapy targets the 4.5 mm SMAS layer using focused ultrasound, lifting and tightening over 3 to 6 months as collagen builds. RF heats skin to 40–45°C for surface tightening and quicker results but less depth