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

https://wool-wiki.win/index.php/Are_Thread_Lifts_More_Predictable_Than_Energy-Based_Devices%3F

Ultherapy targets the deeper 4.5 mm SMAS layer using ultrasound energy, encouraging natural collagen build-up with results peaking around 3 to 6 months