Bum bag by Spiral, From faux-pas to hero piece, Adjustable body strap, Secure clasp fastening, Ornate gold-tone print, Zip closure, Spiral logo patch. 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.