The Facial Threads or Silhouette Soft sutures are made of a Poly L-lactic (PLLA) The Facial Threads or Silhouette Soft sutures are made of a Poly L-lactic (PLLA), a well known polymer that has been used on the decades for many biomedical and pharmaceutical applications including suture threads (the material that stitches are made from), pins used in orthopaedics, and rods, screws and nails that are used to treat bone fractures. This particular PLLA is very biocompatible with human beings and is also biodegradable over time in the body. PLLA also stimulates your body to make new collagen and this is a huge natural benefit that create your face looking fresh and rejuvenated over many years. There is no special preparation required before the Silhouette Soft treatment or Thread Lift treatments are performed. It is essential that during our consultation, you let me know of any other treatments you have already undergone for your face and also let me know of any medications that you are on.