Knuckles the Echidna, dressed in a blue-green surgical gown, white surgical gloves and a light blue-green surgical cap which covered his hair quills, and is breathing in his white JFYCO 6100 duckbill-style disposable surgical respirator mask (with grey straps), which echidnas, ducks, crocodiles, dragons, wolves and coyotes wear because these masks fit them best, over his nose and mouth, to protect him from any harmful airbourne particles and nasty germs.