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

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

Ultherapy targets the 4.5 mm SMAS layer using focused ultrasound, lifting and tightening skin gradually with results peaking around 3 to 6 months. Compared to RF, which heats skin to 40–45°C for collagen boost, Ultherapy reaches deeper layers