Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, offering...

https://gregorywads092.lowescouponn.com/can-rf-tighten-skin-but-not-lift-what-does-that-mean

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, offering deeper lift than standard HIFU or RF, which heats skin to around 40-45°C for collagen boost. Thread lifts mechanically lift but results show immediately and may last a year