Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating...

https://wiki-quicky.win/index.php/What_Does_Ultherapy_Do_at_a_Tissue_Level%3F

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating collagen deep under the skin for a natural lift