Ultherapy targets the deep 4.5 mm SMAS layer with ultrasound to lift and...

https://reidscoolthoughtss.swiftnestly.com/posts/what-does-a-proper-assessment-look-like-before-skin-tightening

Ultherapy targets the deep 4.5 mm SMAS layer with ultrasound to lift and tighten over 3 to 6 months. RF heats skin to 40-45°C for collagen boost but works more superficially