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

https://hotel-wiki.win/index.php/Does_RF_Microneedling_Help_Sagging_or_Just_Texture%3F

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