My 4-year-old loves his new boots. He can walk and run in them without any problems. He says they are comfortable. He also said that they are cold when he puts them on, but they keep his feet warm once they warm up. My son has wide feet, and normally wears a size 12 in See Kai Run sneakers. I ordered a size 12 in these boots and they were very large, so I returned and ordered a size 11. When the size 11 came in, I took the liner out of his size 12 sneakers and put it in the size 11 boots, and itSee full review