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

https://www.hometalk.com/member/254051008/alice1337254

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper lift, with results peaking around 3 to 6 months. RF heats skin to about 40 to 45°C, stimulating collagen more superficially