Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, making...

https://archeredxm754.timeforchangecounselling.com/ultherapy-vs-thread-lift-which-is-better-for-a-sharper-jawline

Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, making it unique compared to RF and standard HIFU that work more superficially around 40 to 45°C. Thread lifts offer immediate lift but with a shorter timeline