It is unrealistic to use the physical characteristics of ice "cold expansion" to achieve the effect of water "expansion" in shoes. Because the water inside the shoes is not sealed and can't freeze quickly, the water will penetrate outside the shoes, but the insufficient amount can't expand enough.

Leather shoes are not suitable. If you have a slight cramp, it will stretch after wearing it for a few days. If it is too small, I'm afraid I can't help it.