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

https://fernandosgreatinsight.urbanvellum.com/posts/how-long-does-ultherapy-take-to-show-results-4-to-6-weeks-or-longer

Ultherapy targets the deeper 4.5 mm SMAS layer with ultrasound energy, lifting and tightening over 3 to 6 months. In comparison, RF heats skin to around 40 to 45°C for collagen boost but stays more superficial