The kids started to put on winter wear to school at the end of November.
We received a newsletter from the school to remind the parent to make sure the kids wear proper winter wear (boots, gloves, scarf, head wear and heavy jacket) to school starting from next week (the last week of November) since the temperature starts to drop.
I have no idea what kind of boots should they wear. I contacted a few friends who lived in the UK/US, observed what other kids are wearing and asked the teacher.
That weekend, we went for winter clothing hunting.