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

https://archeredxm754.timeforchangecounselling.com/does-ultherapy-help-with-skin-texture-or-only-lifting

Ultherapy in Singapore uses focused ultrasound to target the 4.5 mm SMAS layer, promoting gradual lift over 3 to 6 months. Unlike standard HIFU, which targets more superficial layers, Ultherapy reaches deeper for a more noticeable effect