Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer deep under...

https://qqpipi.com//index.php/Is_Ultherapy_Safe_Around_Nerves_and_Bone_Because_of_Imaging%3F

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer deep under the skin, stimulating collagen over 3 to 6 months for natural lift