Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer deep under...
https://page-wiki.win/index.php/What_Does_Ultherapy_Do_at_a_Tissue_Level%3F
Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer deep under your skin, encouraging gradual lifting and tightening over 3 to 6 months