Noninvasive skin tightening is a technology done to lift the skin without even minimal penetration to skin layers. Therefore, cosmetic surgeons can effectively tighten moderately lax or creepy skin on the face, neck, and body, helping patients improve their appearance without surgical intervention. It works on stimulating collagen reproduction by inducing heat to the deep layers of the skin. There are two types of skin tightening technology; MFU (Microfocused ultrasound) and Non-Ablative Radiofrequency. This article focus on MFU, its efficacy, safety, complication and patients who are suitable for MFU.