Twin threads (also known as double screw threads) are a type of PDO thread used in aesthetic treatments that consist of two threads twisted around the needle instead of one. This design increases the thread’s surface area and enhances its lifting power and collagen-stimulating effect. Twin threads are especially effective for treating areas with moderate sagging or volume loss, such as the cheeks, jawline, and nasolabial folds. They offer more support and better skin tightening than single screw threads, making them a popular choice for patients seeking noticeable but natural-looking facial rejuvenation.