Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, lifting...

https://www.bookmarking-keys.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-natural

Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, lifting and tightening over 3 to 6 months. In comparison, RF heats skin to around 40 to 45°C for collagen boost but stays more superficial