Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating...
https://meet-wiki.win/index.php/What_Are_Ultherapy_%27Lines%27_and_Why_Do_They_Matter%3F
Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating collagen deep under the skin for a natural lift