From Vionic, the Uptown Calf Hair Packable Penny Loafers feature: Calf hair upper Travel-friendly collapsible upper that packs flat Slip on with back pull tab Unlined upper Removable microfiber-wrapped EVA footbed 360 Ultra Flexible lightweight rubber outsole Approx. 1" platform height Approx. 1.12" heel height It is recommended to wear your new pair for a few hours to allow your feet to adapt to the new support. Imported.