Could mademoiselle chanel have known, somewhere deep in her desperately chic bones, what travails the 21st-century traveler would face?Exactly 50 years ago, Coco launched her famous two-tone spectator pump: a sleek beige chassis with a jaunty black toe-cap, borrowed, like so many of the designer's innovations, from men's sportswear. Now, a half-century later, when even the most glamorous globe-trotter must contend with cramming her wardrobe into a minuscule carry-on, what could be better than Chanel's bicolored ballet slippers, equally at home with frothy frocks and well-worn jeans, happy to attend midnight suppers, then get up early the next morning for a multi-arrondissement trek exploring ancient alleyways, and practically (thanks to those black toes) scuff-proof. It is difficult to imagine any other single shoe that so seamlessly takes the place of both sneakers and evening sandals, while managing to look effortless and fabulous to boot.