Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and...

https://johnathanytzx289.image-perth.org/if-i-only-care-about-fine-lines-should-i-skip-ultherapy

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and tighten skin gradually over 3 to 6 months. Compared to RF, which heats tissue around 40 to 45°C for collagen boost, Ultherapy penetrates deeper for muscle-level impact