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

https://wiki-site.win/index.php/Can_Ultherapy_Replace_a_Facelift_if_It_Targets_the_Same_SMAS_Layer%3F

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