Hello guys, I recently thought of buying a backpack for travel purposes. I have browsed for them on the internet and I am confused to choose between American Tourister, HP, F Gear and Zwart. I do not have specific requirements, a good sized backpack for a 2-3 days travel(25-35L capacity) should suffice. If any of you guys already have a backpack please let me know which one to choose. Also feel free to suggest anything else from the above-mentioned brands. Thanking you in advance.