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

https://wiki-dale.win/index.php/Laser_Resurfacing_vs_RF_Microneedling_for_Skin_Texture_in_Singapore

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and tighten skin gradually, with peak results around 3 to 6 months. Compared to RF treatments that heat skin to 40-45°C for collagen boost, Ultherapy penetrates deeper