Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer to promote...

https://www.runway-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-deep-skin

Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer to promote collagen over 3 to 6 months, making it a top choice for deep skin tightening