Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep,...

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

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep, natural lift, with results peaking around 3 to 6 months. RF heats skin between 40 to 45°C mainly for collagen tightening but less depth