Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, which few...

https://cruzqmfp756.theburnward.com/what-age-is-best-for-rf-tightening-focus-on-your-30s-to-early-40s

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