Oxygen tanks/air filters on backpack frame connected to a nasal oxygen cannula on his face.
Unidentified, possibly custom-made medical-looking latex/rubber jaw supporter. Similar to what you would wear for snoring/sleep apnea.
Necklace made of doll heads in assorted sizes.
Kidney Belt and Codpiece
Leather belt decorated with a baby doll face. Codpiece made of baby doll heads.
Black stretch trousers covered by what appears to be loose, black/charcoal scrap chaps.
Shin and Knee Guards
Foam rubber shin guards. Unidentified.