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

https://gunnerawsh736.cavandoragh.org/is-it-normal-for-results-to-be-progressive-after-ultherapy

Ultherapy targets the deeper 4.5 mm SMAS layer using ultrasound energy, encouraging natural collagen build-up with results peaking around 3 to 6 months