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

https://knoxbfmd479.fotosdefrases.com/is-ultherapy-backed-by-real-studies-or-mostly-marketing

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for deep tissue lifting, with results peaking around 3 to 6 months