This item has two styles, named "Yersinia Pestis" and "Vibrio Cholerae". The "Vibrio Cholerae" style gives the hat a light leather appearance with black stitching while the lenses are made darker and more empty, as opposed to the glassy look of the default "Yersinia Pestis" style. Paint is also applied differently, either to the base of the beak or the lenses, depending on the style.
|Yersinia Pestis||Vibrio Cholerae|
- Beak masks, whilst finding popularity in mask parties, originated as primitive gas masks for Medieval plague doctors during the Black Death. The beak was reputed to be filled with scented materials, such as posies, roses, carnations, mint, camphor, ambergris, cloves, myrrh, or even a vinegar-soaked sponge, as at the time it was believed that "bad air" caused disease. Sometimes the materials which got filled inside the beak worked as a "filter", causing the doctors to have a smaller risk to be infected. Because of that the so-called miasma theory of disease got popular back then. In fact, malaria receives its name from Medieval Italian for "bad air".
- The "Yersinia pestis" style is named after the bacteria responsible for all three variants of the Black Death, while the "Vibrio cholerae" style is named after a bacteria responsible for causing cholera in humans, two species of bacteria that were prevalent during the Black Death period.