Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and...

https://www.hometalk.com/member/254051008/alice1337254

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and tighten skin, with results building up over 3 to 6 months. Compared to standard HIFU, it penetrates deeper with precision