Architecture plays a prominent role in Mercedes Castillo's debut collection, and the clean, asymmetric lines of the Izar slide bring a modernist, structured feel to the mule silhouette. A sculpted, stacked heel inspired by the floating staircases of architect Isay Weinfeld finish the look with of-the-moment allure. Color(s): taupe. Brand: MERCEDES CASTILLO. Style Name: Mercedes Castillo Izar Mule (Women) (Nordstrom Exclusive). Style Number: 5331216.