Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, which few...
https://www.blaze-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-gradual
Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, which few treatments reach, offering a natural lift that improves over 3 to 6 months. RF heats skin to 40-45°C to boost collagen but doesn’t penetrate as deep