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

https://www.bookmarkingvictor.win/ultherapy-targets-the-4-5-mm-smas-layer-with-ultrasound-energy-reaching-deeper

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