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

https://www.normalbookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-stimulating

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for natural lift and tightening, with results peaking around 3 to 6 months. Radiofrequency heats skin to 40-45°C for collagen boost but works more superficially