Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting...

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

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, promoting collagen deep under the skin with minimal downtime. Results build gradually, peaking around 3 to 6 months