Ultherapy targets the deeper 4.5 mm SMAS layer with focused ultrasound energy,...

https://landensnewperspective.hexaforgey.com/posts/is-numbness-after-hifu-normal-or-a-red-flag

Ultherapy targets the deeper 4.5 mm SMAS layer with focused ultrasound energy, stimulating collagen over 3 to 6 months for a gradual lift