Here we would like to introduce to you the three types of PDO Threads that are often used in combination in Korean Thread Lifting therapy. 1. Mono Threads Mono threads are smooth threads without barbs. Many of these thread type are placed into the face in a mesh-like fashion for skin tightening effect. Skin tightening usually improves after collagen starts forming around the threads. The treatment areas are often neck lines, neck sagginess, forehead and under eyes. Between 10 -20 mono threads