If it's crap ... We'll tell you
It's possible that we haven't seen him in years because he was getting hair plugs or maybe he's sporting a hair system like the one that JohnTravolta wears which is made with a fine mesh material. Hairs are put together meticulously one hair strand at a time.
Below the mesh, a transparent plastic material is used to attach the hair system
to the skin. The hair system is supposed to have the hair attached in a way that does not show the mesh at all, but if you look close you can see Travolta’s hair does not conceal the mesh too well.
...I mean besides take the lead role in I Don't Care Anymore: The Phil Collins Story