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

https://www.paste-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-to-tighten

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