Backpacks are great – they keep the big, old laptop from you and distributed, that heavy weight on both shoulders. I know there are some of you to be cool to both shoulder straps of the backpack, but you do not realize the damage you do to your spine? We are talking about scoliosis, here! Pinched nerve, pulled muscles and torn rotator cuffs not very cool for us, so both straps.We can hear the complaints from here. Backpacks are big and bulky things. They are so far from the back, knocking you if you people on tight curves. Not this one, kiddies. This backpack is slim and trim, but can a 17″ laptop comfortably inside. Slide the soft and stretchy neoprene strap on the shoulders, and it feels like gravity, that it hardly exists.