Hoihoi-san
Close up of the head construction. I felt Canti should be segmented since he transforms "seamlessly", so aside from fun foam not coming in sheets large enough to cover him without seams, it was a good way to hide uniform seams.
The head is basically a foam core box with upholstery foam glued to the sides to secure the head to my head using friction and pressure. I cut a hole out the top so air could escape so when I breathe, the head doesn't fog up as easily.