The Sonic the Hedgehog Backpack Set. You get a backpack, pencil pouch and lunchbag! medium-sized backpack featuring a zip closure and made of polyester material. With a blue color and Sonic character design, this unisex kids backpack is perfect for young fans of the Sonic The Hedgehog franchise. With a width of 13 inches, this stylish backpack is both practical and fun for everyday use.