Prince squash shoes have been around for ages. They are indoor court shoes, suitable for squash or racquetball or any other sport where you need non-marking soles.
I used to wear these back in college and liked them, though they looked a little weird. One teammate used to call them “sawed-off shotguns” because the toe box is kind of flat on these shoes. The weird shape is something Prince call “NFS”, which stands for Natural Foot Shape. Many players, especially those who have wide feet, swear by Prince squash shoes.
In the last few years, as Prince’s parent company has gone through different restructurings, these shoes have become difficult to find in the US, UK and worldwide. Prince fans are collectively holding their breath, hoping that in 2019 we will see Prince indoor shoes appear back on the market in large quantities.