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

https://direct-wiki.win/index.php/How_Do_I_Choose_Between_Tightening_and_Lifting_for_My_Neck%3F

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, promoting gradual tightening over 3 to 6 months. Compared to RF, which heats skin to about 40 to 45°C to boost collagen, Ultherapy reaches deeper layers for lift