Highly recommend this backpack. Traveled with it for 12 days. Fit everything I needed on the way, as well as a few extra items I brought back. Even when I thought I put too much in, it molded in place effortlessly. It is made of sturdy material and held up well from place to place. The daypack came in handy, and easily zips back on the main pack.  The straps to hold everything in place (and to your back) were perfectly situated. Would not change a thing on the layout.  Zippers worked well with two small locks I purchased. If looking for a backpack to use in fast-paced travel for good amounts of time, this is it.