Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, lifting...

https://wiki-stock.win/index.php/What_Age_Is_Best_for_RF_Tightening%3F_Focus_on_Your_30s_to_Early_40s

Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, lifting and tightening over 3 to 6 months. In comparison, RF heats skin to around 40 to 45°C for collagen boost but stays more superficial