The mask is made of a linen fabric. For those who read Clive Barker's Cabal novella, which was later adapted into the movie Nightbreed, Dr. Decker's mask is described as being made of a scrim cloth. I felt this would look most authentic and be the most comfortable to wear. However in the movie Nightbreed, Decker's mask was made of a foam latex.
Making this mask was a huge undertaking. Took me lots of time, work and research but then again so do all true labors of love. Without getting too much into the boring details, I will say that I learned many things about sculpting and moldmaking to do this right. I even had a lifecast made of my head in order to get the mask to fit my head perfectly. Long story short I couldn't be happier with the end result.
Complete costume shots to follow soon.