Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for natural...

https://mylesxbqi254.trexgame.net/are-thread-lifts-more-predictable-than-energy-based-devices

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for natural lift and tightening, with results peaking around 3 to 6 months. Radiofrequency heats skin to 40-45°C for collagen boost but works more superficially