Bum bag by Mi-Pac, Fully lined, Adjustable buckle waist strap, Zip closure, H: 11cm/4 W: 22cm/9 D: 8cm/3. Mi-Pac fuses classic style with contemporary British designs to create a range of tough and durable rucksacks and backpacks. Famed for their faux suede bottom, the brand adds a feminine spin to boyish bags. Revamping styles with graphic checks, block colours and patriotic flag prints. Shop across four cool collections classic, textile, flag and two-tone.