Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound, encouraging...

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

Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound, encouraging collagen over 3 to 6 months for natural lift. RF heats skin to 40-45°C for surface tightening but doesn't reach as deep