I bought this bag through another company and immediately the lumbar airpack was deffective couldn't keep the air. I replaced the airpack from another backpack I had because the manufacture never answered my email and the airpack for the arm straps deflate and never worked. After a semester and half the backpack ripped, it couldn't handle all the college text books and a 15" laptop. Sorry but this quality is junk. Do yourself a favor get another bag that is durable. This bag will not last. Believe me, I treated the bag with care it just couldn't handle the cargo, I'm talking about 6 college text books 1 notebook sometimes 2, 15" laptop, AC Adapter, pens/pencils/highlighters and miscellaneous. Don't waste your money!!!!