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

https://www.click-bookmark.win/ultherapy-uses-ultrasound-energy-targeting-the-4-5-mm-smas-layer-to-stimulate

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, a key support structure in your face, gradually lifting and tightening over 3 to 6 months