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

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

Ultherapy uses focused ultrasound energy to target the 4.5 mm SMAS layer, helping lift and tighten skin with results building over 3 to 6 months. Compared to RF, which heats skin to around 40-45°C for surface tightening, Ultherapy goes deeper