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

https://station-wiki.win/index.php/Best_Non-Surgical_Option_for_Mild_Laxity_in_Your_30s_in_Singapore

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