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

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

Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer, promoting collagen over 3 to 6 months for natural lift and tightening. Compared to RF which heats skin to 40-45°C mainly in the surface layers, Ultherapy reaches deeper tissues