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

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

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, working deep beneath the skin for gradual lifting that peaks around 3 to 6 months. RF heats the surface to 40-45°C for collagen boost with milder results and quicker recovery