Calpak's backpacks, messengers, and laptop bags have all the features students and adults need such as comfortable padded shoulder straps, pockets for your calculator, pens and pencils and more pockets for all the other stuff you carry. They also include a padded computer sleeve on many of their models to fit whatever your needs might be.
PROS: Very well designed, I like the way it zips apart so you can have two small bags, great wheels, and travels well. This bag has lasted longer than most of the bags I have bought for my job in the last 40+ years
CONS: Zippers on shoulder strap compartment wear out fast, bottom of pack wears out fast ( took mine in to shoe repairman and had a large piece of leather sewed on bottom). Shoulder pads could use more pading