Get a jump on back to school with the Superdry Backpack The Superdry Backpack is a medium-sized, unisex kids' backpack with a zip closure and bright yellow color. Made from 100% polyester, this stylish backpack is perfect for getting your child ready for back to school. With its comfortable design and trendy Superdry brand, this backpack is sure to be a hit with both kids and parents alike.