The answer to this question is not fixed. Messenger bags and backpacks are common choices for any traveler, but depending on your needs, one of them may be better for you than the other. Here are some questions to ask yourself to determine which bag is best for your needs
1.How heavy are the items I am carrying？
If you carry a lot of heavy items, such as laptops, tablets and other electronics, it does help to spread the weight over two shoulders, not just one.This is especially important when crossing large international terminals.So if you carry a heavy load, you may find that you need a backpack more, just for the comfort of it.
2.What do you wear when you travel?
If you're traveling in a suit and planning to meet a client as soon as you take off, you might want to put a messenger bag on your backpack because it's unlikely to crease your clothes.It also allows your back to breathe, reducing sweat buildup.In addition, messenger bags are more fashionable than backpacks, so when meeting customers, messenger bags can give people a better visual experience.
3.Will I be in a crowded place?
This is a tricky problem because if you want to walk through a crowd, the backpack is better because it's easier to get through the crowd.However, if you are in a crowded place such as a train or bus, it is more comfortable to put your postman's bag easily on your lap.So, think carefully about what kind of space you will interact with during your trip, and choose a better space.
Once you have answered these questions, you should have a good idea of which type of bag is right for your needs.