Ultherapy targets the deeper 4.5 mm SMAS layer using focused ultrasound,...

https://www.phone-bookmarks.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-helping-lift

Ultherapy targets the deeper 4.5 mm SMAS layer using focused ultrasound, promoting gradual tightening over 3 to 6 months. Compared to RF, which heats skin to 40-45°C mainly for surface collagen, Ultherapy reaches deeper layers