Ultherapy uses ultrasound targeting the 4.5 mm SMAS layer deep under your skin,...

https://trulyexpatlifestyle.com/non-surgical-skin-tightening-in-singapore/

Ultherapy uses ultrasound targeting the 4.5 mm SMAS layer deep under your skin, which is tough for RF or standard HIFU to reach. This makes it great for lifting over 3 to 6 months as your collagen rebuilds