From Vionic, the Uptown Mule 2 Leather Penny Keeper Platform Mules feature: Leather upper Penny keeper strap detail Slip on Removable microfiber wrapped EVA footbed Built-in VIO MOTION Technology footbed featuring contoured arch support, with shock absorbing cushioning, deep heel cup to provide stability and forefoot flexibility Synthetic rubber ultraflex outsole Approx. 1.12" heel height Approx. 1" platform height Imported.