Ultherapy uses ultrasound to target the 4.5 mm SMAS layer, making it popular...

https://atavi.com/share/y0ukq9z4xuml

Ultherapy uses ultrasound to target the 4.5 mm SMAS layer, making it popular for lifting deep tissue without cutting. RF heats skin to around 40-45°C to boost collagen, great for mild tightening