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

https://www.web-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-a-deep

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper lift that unfolds over 3 to 6 months. RF heats tissues around 40 to 45°C, stimulating collagen closer to the surface with faster recovery