Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper...
https://www.slideserve.com/gierrepjfu/which-areas-can-ultherapy-treat-neck-brow-d-colletage-explained
Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper skin lift, with results peaking around 3 to 6 months