Ultherapy uses focused ultrasound targeting the deeper 4.5 mm SMAS layer to...

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

Ultherapy uses focused ultrasound targeting the deeper 4.5 mm SMAS layer to stimulate collagen over 3 to 6 months, offering gradual lifting without downtime