Ultherapy targets the 4.5 mm SMAS layer using ultrasound energy, lifting and...

https://bizzmarkblog.com/is-ultherapy-fda-cleared-for-lifting-or-just-tightening/

Ultherapy targets the 4.5 mm SMAS layer using ultrasound energy, lifting and tightening skin gradually with peak results around 3 to 6 months