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

https://cruzinnp079.tearosediner.net/what-is-the-difference-between-dermal-tightening-and-lifting-outcomes

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