Your language is not normal. The opening of the shoe is made of flexible material without much flexing. The shoes were really difficult to put on. I made one, they fit well and are easier to put on as I continue to use them.
Pros
Fits perfectly.
Cons
THE SHOES ARE TOO NARROW FOR THE 13D IN THE FOOTBED AREA. I was afraid to put it on. WIDTH FOR MEN'S SHOES MUST BE SPECIFIED.