What kind of travel bag is suitable for traveling?

I think it is more appropriate to take a backpack with dirt resistance, hard material and large capacity when traveling.

I usually travel with this kind of bag, which can hold a lot of things. There are many layers in it, which also saves me a lot of storage time. The backpack is convenient to carry, and it is best to have an opening similar to anello's design on it, so as to prevent the things in the bag from being stolen. But it doesn't matter if you don't. You can be careful not to put valuables in it.

The reason why it is resistant to dirt is that it is definitely inconvenient to carry a travel bag. Sometimes you can only put it on the ground, otherwise you may be rubbed by dirty things when you walk on the road. If you have no resistance to dirt, you can easily see it and feel humiliated when you carry it. So I usually choose the black one.

Then the material is preferably hard, and it can still be used in case something heavy is put in or scratched by something sharp.

My idea is based on my itinerary. If you have money and someone gives it to you, recite it.