BIOWORLD Nintendo Super Mario Bros. Bowser Shell Backpack. Level up your everyday carry with the Nintendo Super Mario Bros. Bowser Shell Backpack, a bold and playful accessory inspired by the King of the Koopas himself. Designed in the iconic shape of Bowser’s spiked shell, this eye-catching backpack features dimensional, figural spikes that bring the look to life. Inside, it’s just as functional as it is fun, offering a padded laptop sleeve along with multiple compartments to keep your essentials organized. The adjustable straps are accented with studded details for an extra edge, making it a standout choice whether you’re heading to a gaming session, school, or your next adventure. Measuring approximately 15 inches wide by 20 inches high and 6.5 inches deep, it delivers both style and practicality in one power-up-worthy package. Polyurethane & polyester. Imported.