Fanny pack. Bum bag. Whatever you call it, the 'hands-free' walker bag has a storied history, most notably for its popularity in the 80s and, equally, its colourful mockery from the late 90s till now (look no further than Seinfeld or, more recently, The Rock’s bum bag blast from the past). Whatever the reason they fell slightly out of favour, they’re back, they’re fresh and it’s time to bag up again.