Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a natural...

https://www.foxtrot-bookmarks.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-reaching

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a natural lift that improves over 3 to 6 months. Compared to RF, which heats skin around 40 to 45°C to boost collagen, Ultherapy reaches deeper tissue without downtime