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As for small everyday details, it's very different. Bigger social things are almost the same.

slippers at home

Wearing slippers at home looks like a crime somewhere in between murder and theft for a Thai person (almost). 😄

Central and Northern Vietnam are damp and chill in winter so the attitude slowly changes with every 100 km north.

boots

They can't help you if you drive a motorbike through puddles and downpours. Very few people have cars in Vietnam, an absolute motorbike nation. And almost no passers-by here - everyone is on a motorbike. People who work outdoors (cleaners, vendors) often wear garden rubber boots in Hue City. Motorbike drivers, if it's raining, are covered with plastic raincoats with feet uncovered, wet, in slippers, 95% or more. In cold winter Hanoi, I am sure there are more guys wearing good leather boots or garden rubber boots.