Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer, promoting...

https://cristiansinterestingthoughtss.opalvector.com/posts/how-long-do-ultherapy-results-last-is-the-12-to-18-months-claim-real

Ultherapy uses focused ultrasound targeting the 4.5mm SMAS layer, promoting collagen over 3 to 6 months for natural lift and tightening. Compared to RF which heats skin to 40-45°C mainly in the surface layers, Ultherapy reaches deeper tissues