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

https://wiki-neon.win/index.php/Best_Non-Surgical_Option_for_Moderate_Sagging_and_Jowls:_Ultherapy_and_Ultherapy_Prime_Explained

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, offering deeper lift than standard HIFU or RF, which heats skin to around 40-45°C for collagen boost. Thread lifts mechanically lift but results show immediately and may last a year