Why are there wrinkles on blue sneakers?

The shoes don't fit. If they are as big as your feet, how do you wear them? Therefore, NBA players will wrap elastic bands around their feet when wearing shoes, so that the feet and shoes can be perfectly combined, which not only protects the feet, but also makes them more comfortable. In this case, there is no reason why the shoes are wrinkled. But that thing is expensive, and we don't play professional basketball. Just find something to replace it I don't mind you wearing two pairs of socks on a hot day.