Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer, promoting...

https://www.bookmarkpage.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-promoting-2

Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer, promoting collagen over 3 to 6 months for natural lift and tightening. Compared to RF which heats skin to 40-45°C mainly in the surface layers, Ultherapy reaches deeper tissues