How to try on and buy a backpack in the store
The choice of a backpack for hiking is made, now it remains to purchase it. The ideal purchase option is to test a specific model on a hike. By borrowing a backpack from friends or renting it, in a few days in the mountains it will be reliably known how much it suits you. And when you return to the city, you just buy the same model in the store.
Otherwise - the backpack did not fit or did not go on a hike - take a tourist friend with you and together choose what you need. If you don't have such friends, it doesn't matter! After all, most of the sales assistants in tourist shops are people who have been to the mountains more than once. They will help you choose the best option, taking into account your height and body proportions. https://mysticmountainnaturals.com/how-to-pick-a-nice-beach-bag
Of course, the forums have a lot of information about the selection of a backpack and a description of the different models. Choosing a successful backpack remotely takes a lot of time and is very difficult to do.