This bag is very sturdy with lots of room for books, computer and more. Wheels are large and roll over almost any thing from grass to dirt road. I use this back pack to walk 2-3 blocks to school, in snow rain and horrible winter weather, weekly and it is holding up very nicely. The only thing I wish it had was more (it has 2) smaller pockets designed to hold things like pens and USB drives etc.... If you want a rolling back pack this one is AWESOME (no they did not pay me to say this).