Birkenstock Unisex Uji SandalSize Chart A sport inspired take on the iconic Arizona sandal, the Uji maximizes on the go comfort. A soft felt upper comes together with oiled leather hook and loop straps for a customized fit. The style is grounded in signature BIRKENSTOCK support, with a cork latex footbed that shapes to you with wear. Contoured cork latex footbed creates custom support with wear Synthetic felt upper with two oiled leather hook and loop straps Suede footbed lining