At first I thought "NO Way",,,,, Then I considered these carefully for some of my more extreme followers and realized A person could fit their whole face into the boot if their fetish went that way.
I also discovered
for those who enjoy this type of play they could easily be tied in place for hands free play time. To add a bit more spice
consider being stoned.
But a warning you are at your own risk. This can also be close to asphyxia and dangerous play for my followers that enjoy this type of fetish boot play.
my used find was at EBAY.