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

https://wiki-book.win/index.php/How_Long_Does_Ultherapy_Take_to_Show_Results_%E2%80%94_4_to_6_Weeks_or_Longer%3F

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer to lift and tighten deep tissues, with results peaking around 3 to 6 months. RF heats skin to 40-45°C to stimulate collagen closer to the surface, ideal for mild tightening