Solid Gray is the ultimate hardshell backpack, available in a range of colors. Style and performance are merged in its faceted design. This bag is lightweight, durable and protective, with a highly futuristic look! The super strong shell is made from an advanced polymer plastic. Unlike traditional backpacks, it opens much like a suitcase. Once open, the interior reveals two clever compartments. Use them to stash your valuables for exceptionally concealed storage.