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

https://articlegrovey.com/s/QdhOWU_acVHQ3i-pLl2Jf

Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer for deeper skin tightening, with results developing over 3 to 6 months. Compared to RF which heats skin to around 40-45°C for collagen boost, Ultherapy works deeper but can feel more intense