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

https://griffinyoot346.raidersfanteamshop.com/is-ultherapy-safe-around-nerves-and-bone-because-of-imaging

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and tighten deeper tissue, with results peaking around 3 to 6 months. Compared to RF, which heats skin to 40-45°C mainly for surface collagen, Ultherapy reaches deeper layers