It is a "cheeseburger mask". A design in which lettuce, tomato, and cheese are layered on a thick patty and sandwiched with sesame buns. The price is $ 39.99 (about 4,370 yen), and it is sold on the mail order site perpetual kid.
The mask has "peepholes" for both eyes and is made of synthetic rubber. The approximate size is width 29 x depth 29 x height 23 cm. It fits the head of most adults.
When you're done using it for Halloween, you can pack a dry paper towel inside, put it in a plastic bag, and store it in a cool, dry place.
In addition, the notes on the site are as follows.
Side menu potatoes are not included. Even if you eat it, it only tastes like rubber.