Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper...

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 for a deeper lift, with results peaking around 3 to 6 months. RF heats skin to about 40 to 45°C, stimulating collagen more superficially