Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, reaching...

https://www.bookmarking-base.win/ultherapy-targets-the-deeper-4-5-mm-smas-layer-using-focused-ultrasound

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, reaching deeper than most RF treatments that heat skin to around 40 to 45°C. Compared to standard HIFU, Ultherapy delivers more precise energy for lifting