Black Madewell Jill Slingback Mule Very good worn condition No visible scratches and heels show very little wear. Description from Madewell: Made of buttery soft leather, these superwalkable low stacked heels have the cool minimalism of a mule and the stay-on-ability of a slingback. The perfect shoes for showing off some cute socks when it's chilly out. Cushiness alert: We've added an extra layer of padding to make them even easier on the feet. Leather upper. Man-made sole. Import.