Ultherapy targets the 4.5 mm SMAS layer with ultrasound energy, helping to lift...

https://messiahwmff829.lucialpiazzale.com/what-is-the-submental-area-and-which-treatment-targets-it

Ultherapy targets the 4.5 mm SMAS layer with ultrasound energy, helping to lift and tighten deeper tissues. It’s different from RF, which heats skin to around 40 to 45°C for collagen boost but stays more superficial