TopOfStyle offers mules and clogs for men at heavy discounts; shop the best-selling mules starting from less than $15. Birkenstock is a luxurious German footwear and shoe brand owned by L Catterton. The brand was founded way back in 1774 by Johann Adam Birkenstock, and it is headquartered in Linz am Rhein, Rhineland-Palatinate, Germany. Gray is the perfect combination of dark and light colors. Apart from colors and styles, choosing the material is crucial before you shop your favorite Birkenstock Gray Mules & Clogs for men. Available material options are: Leather, Suede and Fabric.