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

https://mill-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 for deeper lifting, with results peaking around 3 to 6 months. RF heats skin between 40 to 45°C to boost collagen, great for surface tightening but less depth