It's easy to carry a backpack around but that can change when you are doing it around a gigantic campus. Some of the largest campuses in the world these days are so big that people actually take cars and buses to one places to the other because it would take so long to walk.

That's wy when you have a bacpack that weighs 20-40 pounds you acn see how that could cause a problem for your back and really wear you out. By using up energy on walking ad carrying, you actually hurt your ability to learn. It's been proven that if you are tired you simply won't retain as much information because your body doesn't have as much energy.

Add a laptop to you rbackpack and you will definitely be carryin ga lot more than you probably want to. Even though backpacks are smaller than they used to be they can still be too much to carrying around school or work for a long time. If you get a rolling back the backpack will weigh more, because it has special functions but you shouldn't have to actually use it as a backpack unless you run into certain scenerios, such as glass or snow. It's not going to work well on uneven surfaces. Hard roads that are even are the best. Rolling backpacks are great for these reasons especially.