The custom-made masks (lifemask and wearable mask) are made of a hard resin composite in full 24-bit color with a matte varnish. The colors are not painted on but are actually part of the make-up of a thick color outer layer of the model. Due the to the manufacturing process, the surface is slightly rough to the touch (sugar-coated) and some layering can be visible. Please avoid banging, wetting or direct sunlight.
The masks are not flexible. They can be drilled into with a standard house electric drill (like in wood) if you'd like to add more holes in it at a later point.