You will need foam core for the construction of this model. The metal texture is available for inside the helmet. There are some vague instructions to scale the image for sizing, but it is possible. The standard size fit my standard male head size. A piece of foam core smashes down my nose just enough to hold the helmet firmly on my head even when moving around. I get great comments from high school student when I wear it at school (I'm a teacher).
[5 of 5 Stars!]