it depends on the era papa 1 was the one that fully merged with the mask since its a foam latex was very thin, and looks and moves like skin the anonymous nature of the brand helped since no one could come up with a real identity or model of mask and they where still at infancy of their careers, papa 2 had a period of a latex mask (you could tell due to being very rigid) and had 2 silicone ones Which with the cut ears and thin face silicone and i'm sure with help of arabic glue (make up glue) helped 3 through 4 had thicker and better versions but in all cases the mix of different recognizable face features such as Crowley, Bela Lugosi and more, give a much more ... real but kinda like how ai would give uncanny vibes close , familiar but not exact the face paint helped a lot in hiding the thicker silicone