Madewell Robbie Slingback Mule Size: 8 You can have it all with this shoe: the cool factor of a mule and the security of a slingback, plus elastic panels for a snug fit and a low stacked heel for extra polish. It's one to keep wearing into next season. And, cushiness alert: Our MWL Cloudlift Lite padding feels like walking on a...well, you know. Condition: Good preloved condition. Creasing at vamps, normal wear of shoe and soles.