Made from 100% Polyester, this black, teeny-tiny little backpack for kids features a giant, honkin' Batman symbol filled with a liberal sprinkling of glitter-foil!  The backpack measures 10.5" high and about 11" wide with a velcro sealing pocket on the outside. Unfortunately, I'm not sure how wide the dang thing is 'cause there ain't any...stuffed bears or anything crammed in there yet.  Anyway, the main, giant holding tank is sealed with a zipper, and the straps are, of course, padded and adjustable.  Good gravy, this itsy-bitsy kids backpack for Batman fans is....it's cool.  Just..uh...just don't try to stick a bowling ball in it or anything.