PDO threads vary in shape, length, thickness, and strength. The type of PDO that that will be best suited for you can be determined based on treatment area, but also based on individual anatomy. The most popular type of PDO threads are the barbed threads, which are used to lift areas that are lax or sagging, as well as sculpt the face. Additionally, smooth threads and twist threads are used more as "skin boosters", as they are able to tighten and smooth the skin helping to minimize fine lines and wrinkles and build collagen. Mesh threads are stronger molded threads that can be great for treating deeper wrinkles, but also to better house filler when used in conjunction.