Generally, short pants are inappropriate anywhere but a beach resort or a farm, and you will look like a foolish tourist on the streets of most cities. Jeans are almost always fashionable except for business occasions. Further, in any business setting never where shorts even if they are cut from the finest Italian fabric.
Winter (November through April) can be cool in Hanoi, and a coat may be necessary. Dress here is a bit more formal and conservative than the fashionable South.
Besides, clothes are really cheap here so you don’t really need to pack too much, and it’s a great excuse to go shopping when you arrive! It’s also really cheap to get clothes laundered. Good walking boots with ankle support are a must, as is a comfortable change of shoes.
You may need to wear these second shoes if you get blisters, so choose carefully. A pair of trekking sandals which can fit socks underneath can be a good option too.
So the above information addressed the question ” How should I dress while traveling in Vietnam?”. Welcome to Vietnam!