Vionic Spark Willow Ballet Flat, Size 8 Black suede leather upper Upper is encrusted with crystals Sole material: Ethylene Vinyl Acetate (EVA) Outer material: Leather Leather and textile lining Closure type: Slip-on, Pull-On Rubber sole Heel measures approximately 0.5 inches Removable insole/footbed Vionic footwear features Orthaheel Orthotic Support Technology to give your feet support and comfort. VIONIC® Advanced Motion System (AMS) technology combines the podiatrist-designed orthotic with a flexible and cushioned outsole for all-day support during work, play, and everyday. Textile lining keeps feet cool and dry with a removable, textile-lined, EVA footbed. Flexible and lightweight rubber outsole with patterned tread. Excellent preowned condition. Worn only a handful of times due to a foot injury.