Dr. Derpy Hooves, anesthesiologist at Ponyville General Hospital, dressed in a violet EquestriTech surgical gown which covered her wings, light-violet EquestriTech surgical gloves, a light-violet EquestriTech surgical tail cover which covered her tail, a light violet EquestriTech surgical cap which covered her ears and the most of her hair except for the back, and is breathing in her white EquestriTech EMFFN95-M/L-W flatfold-style disposable particulate surgical respirator mask over her nose and mouth, to protect her lungs from any harmful airbourne particles and nasty germs. Derpy's mask also keeps her muzzle warm.