Bum bag by Jack Jones, Fabric outer, Adjustable body strap, Secure clasp fastening, Zip closure, Do not wash, 100% Polyester. Founded in 1989, Jack & Jones is a Danish brand that offers cool, relaxed designs that express a strong visual style through their diffusion lines, Jack & Jones intelligence and Jack & Jones vintage. Using innovative treatments and cuts Jack & Jones place their signature laid back style on to a whole range of clothing from print t-shirts to jeans.