Bum bag by Spiral, From faux pas to hero piece, Sequin-embellished front, Adjustable strap, Buckle closure, Zip fastening, Branded lining. 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.