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

https://wiki-mixer.win/index.php/Why_Does_My_Jawline_Look_Softer_Even_If_My_Skin_Texture_Is_Fine%3F

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