Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your...

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

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer beneath your skin, reaching deeper than most RF devices, which heat tissue around 40 to 45°C. Compared to standard HIFU, Ultherapy offers precise energy delivery