Pupils start school in March 2022 1. Is it cold to wear single shoes?

If the weather temperature is around 10℃, children can't wear single shoes in the north, because this temperature is early winter in the north, and the somatosensory temperature is already very cold. Adults are beginning to wear a pair of cotton shoes, let alone children. Of course, children can't wear single shoes, so they need to wear two thin cotton shoes to avoid frostbite on their feet.