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

https://www.active-bookmarks.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-which-few

Ultherapy uses focused ultrasound to target the 4.5mm SMAS layer, promoting gradual skin tightening over 3 to 6 months. Compared to RF, which heats tissue to 40-45°C for collagen boost, Ultherapy penetrates deeper