JanSport Backpack Navy Blue Unisex Back to School Large Adjustable Zip. This backpack from JanSport is a traditional style backpack with a large main section. A secondary large zipper compartment. It also has a small top zipper pocket, and a small front pocket that includes a clip, netted pocket, and some additional small pockets. The straps are adjustable and there is a handle at the top. This backpack has been in storage, but looks to not have been used. Measurements and condition are shown in the photos.