Nice! I love those masks. A bit expensive, though...
Actually there is a masterplan behind this.
Last year I was in Japan, and I looked up kigurumi sites and there is at least one site where they offer to make masks based on pictures that you give them. They are very worried about copyrights though, so you cannot just send in any picture of your favourite character.
Then, about half a year ago, I read about this program FaceApp. You give it a picture of your face and it projects what it thinks that you will look like 20 years from now, or what it thinks you looked like 20 years ago, etc. But, I understand that it can also project onto what it thinks you would look like a woman, if you are a man, or the opposite.
Then, thirdly, there are these whole body suits that can give a man a more womanly profile. The opposite also exists, but is far less common. Of course, it does not take away what is there, so it does its thing by adding lots of padding etc. It does not create a thin woman, unless you start out very thin.
If you combine the three, you might get the ultimate in crossdressing.
But before I start playing with this more, I want to pick up some experience with kigurumi, and the above mask looks cute. Even my wife likes it (yes. lucky me). If wearing such a mask turns out to be very annoying, I can still call off the project. But it is worth a try.
It is said on kigurumionline.org that they are notorious for copying.
And the text with the mask says that it is based on something Japanese.
This is currently all knowledge that I have.
I am still investigating whether I can find out more, but, even after looking at many pictures I have no further trail. On the other hand, there are some Japanese sites that have few pictures while it is clear that they make many different masks.
To be continued (I hope)