Ultherapy targets the deeper 4.5 mm SMAS layer using focused ultrasound,...

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

Ultherapy targets the deeper 4.5 mm SMAS layer using focused ultrasound, promoting gradual tightening over 3 to 6 months. Compared to RF, which heats skin to 40-45°C mainly for surface collagen, Ultherapy reaches deeper layers