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

https://speedy-wiki.win/index.php/What_Does_a_%27Proper_Assessment%27_Look_Like_Before_Skin_Tightening%3F

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, reaching deeper than most RF treatments that heat skin to about 40-45°C. Compared to standard HIFU, it offers precise energy delivery with fewer sessions