Bum bag by Spiral, Your festival bag, sorted, Branded lining, Glow-in-the-dark design, Clever, right?, Spiral patch, Zip fastening, Adjustable buckle strap. Bored with the basic backpack, Spiral's bags pack a punch with bold, striking designs. Tough and durable design meets trend-led prints across their colour-block styles and signature printed backpacks, which conceal all those handy necessary compartments too.