Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to tighten...

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

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to tighten skin gradually over 3 to 6 months. Compared to RF, which heats tissue to around 40-45°C for surface collagen boost, Ultherapy reaches deeper