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

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

Ultherapy uses focused ultrasound to target the 4.5mm SMAS layer, promoting gradual skin tightening over 3 to 6 months. Compared to RF, which heats tissue to 40-45°C for collagen boost, Ultherapy penetrates deeper