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

https://highstylife.com/thermage-vs-10therma-are-they-both-monopolar-rf/

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper lift, taking about 3 to 6 months to show peak results. Compared to RF that heats skin to 40-45°C mainly for collagen tightening, Ultherapy reaches deeper