The Koopa shell backpack is a plush bag that looks just like a koopa shell from Super Mario Bros, and when not used for hucking at your friends faces to simulate what it would feel like to get hit by an actual koopa shell, the backpack can be used to store stuff in like your Wii system to bring to a friends (or heaven forbid your Xbox One), a bunch of greasy comic books, or just for a child to use to hold his school books.
Versions: Green | Black Spiked
Officially sold by Nintendo, the koopa shell backpack features one zipper pocket, straps that are adjustable to fit any sized human, along with bright green, white, and yellow colors that are sure to get you noticed while walking down the halls at school or riding your bicycle in traffic.
Since the backpack is more-so considered a plush with an added benefit of a backpack, don't expect a lot of room in the backpack, as you could probably call it a pocket rather than a backpack with storage areas. The koopa shell backpack measures approximately 7 inches deep from your back x 16 inches in diameter.
A perfect gift idea for geeks or cosplay lovers, the Super Mario Brothers Koopa Shell Backpack has two adjustable straps that should fit most sized humans, and has a buckle on each strap that lets you easily remove it.
They also have a black spiked koopa shell backpack version here.