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

https://alpha-wiki.win/index.php/Is_Ultherapy_FDA-Cleared_for_Lifting_or_Just_Tightening%3F

Ultherapy uses focused ultrasound targeting the deeper 4.5 mm SMAS layer to stimulate collagen over 3 to 6 months, offering gradual lifting without downtime