Ultherapy targets the deeper 4.5 mm SMAS layer using ultrasound to lift and...

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

Ultherapy targets the deeper 4.5 mm SMAS layer using ultrasound to lift and tighten skin gradually over 3 to 6 months. RF heats the skin surface to 40 to 45°C for collagen stimulation but doesn’t reach as deep