The three types are Saline, Silicone, and ‘Gummy Bear’. From what I have seen, the ‘Gummies’ seem to be the preferred type. Now, that is based on what research I have done, so you may be finding something different. As most of you know, saline has been around the longest, followed by silicone, and finally the ‘gummies’. And of the three types, I have seen smooth surfaced implants and textured surface implants. One thing I found interesting about the ‘gummies’ is that if there is a puncture of a cut/tear, the ‘gummy’ part might come out, but will get pulled back in so it stays in place…..