Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a gradual...

https://trulyexpatlifestyle.com/non-surgical-skin-tightening-in-singapore/

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a gradual lift, with results peaking around 3 to 6 months. Radiofrequency heats tissue to 40-45°C for collagen tightening but works more superficially