Hi Guys

This isn't really a backcountry question but I couldn't find the appropriate forum. I am going backpacking through hostels in Eastern Europe over 2 months and will need one of those big backpacks. I have no idea what I'm supposed to be looking in a backpack so any advice is appreciated!

If it helps I'm about 79kgs and 170cm male with an athletic build. I plan on using hostels so I won't be walking or camping too much so expensive lightweight stuff doesn't appeal too much to me.

Cheers