Description NBN stands for "No Brand Needed." The NBN Trails 15” Computer Backpack is an on-trend backpack designed to support your every need. This backpack features a 15” padded laptop sleeve in the large, zippered main compartment. The front vinyl lash tab and printed lining compliment the high quality material of this backpack. This backpack also includes a backboard for added structure, trolley sleeve, padded back and a side grab handle. Switch out the interchangeable zipper pullers for a custom look..