Silicone sex dolls are made from medical-grade silicone, a synthetic polymer known for its stability and heat resistance. Silicone is nonporous, making it less likely to harbor bacteria and easier to clean. It is also highly heat and ultraviolet (UV) resistant, helping to extend its lifespan.
However, some full size sex dolls made of tpe material are more elastic and softer to the touch, giving them a lifelike feel. However, TPE is porous, which means it can absorb moisture and be more prone to bacterial growth if not properly maintained.