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

https://www.paste-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-to-tighten

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