The most expressive detail of the plague doctor was the beak mask, which was designed to protect the wearer from miasma, or foul odors, believed to spread disease. The beak was filled with fragrant herbs and spices to ward off the noxious air. The mask also had glass eyepieces and a long, black robe to cover the entire body. This grotesque attire served as a constant reminder of the horror and despair that plagued the time, instilling fear and dread in the hearts of those who encountered the plague doctor.