These are wonderful for walkers - wish there was an option for girls.  These stay on my little man's feet and are very thin so they aren't hot.  The sole is very thin though, so it will not last years but then again I hope feet grow faster than the wear and tear on the thin material.  There is enough padding to protect the back of the ankle, something I was worried about when I ordered since my little one runs all around.  He wears size 3 US, these fit perfectly.