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

https://blogfreely.net/sordusgvrj/is-there-downtime-after-a-thread-lift-in-singapore

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deeper lift, with results peaking around 3 to 6 months. In comparison, RF heats tissues to 40-45°C, promoting collagen but with a gentler lift