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

https://reidscoolthoughtss.swiftnestly.com/posts/do-clinics-use-templates-for-ultherapy-or-map-your-anatomy-every-time

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, offering a deep lift that tightens skin over 3 to 6 months. Compared to RF that heats at 40 to 45°C mainly in the dermis, Ultherapy goes deeper