3d model, with the possibility of 3d printing.
Recommendation: The model you see in the photos is only 3D, and to be used for 3D printing it needs adjustments, and that the user need to know measure, and issues with skull circumference, or helmet size references.
Marmoset Viwer is just for bit more visual explanation
*This Archive need to adjust for each individual clients head, and it needs to contemplate the internal padding (self made it) so as not to hurt the client care *