As a kid, were you ever told not to step on the backs of your shoes? Never mind that it was easier to get them on and off with the backs pressed flat beneath your heels. Well, what was once a bad habit is now a cool trend, with a number of leading designers producing shoes that can happily be worn like casual slide-ons - or not. That versatility is the point. The leather is so soft that you can collapse the backs or wear them up like conventional shoes.