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

https://beckettsexcellentjournal.cloudhinter.com/posts/why-does-my-jawline-look-softer-even-if-my-skin-texture-is-fine

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for gradual skin lifting, with results peaking around 3 to 6 months. Compared to RF which heats surface layers to 40-45°C for collagen stimulation, Ultherapy reaches deeper