Fleece, fur, felt, Fun Foam, thread, glue (hot, and Super 77 Spray Adhesive), feather boa--all based on research from photos and video. The original pattern is based on the "blue boy pattern" from someone's aol site, but drastically changed with a new arm/hand pattern and some revisions to the head. The green fur 'coat' pattern is new. There are also plastic rings in the eyes to keep their shape, and they do not blink.