Thoughtfully designed to give you two ways to wear, the Lutry clog is endlessly versatile. A convertible backstrap gives you added security when you need it, and flips up when you want a more relaxed look. It's all grounded in our original contoured footbed for the ultimate support.FeaturesContoured cork-latex footbed creates custom support with wearClassic suede upperSuede footbed lining helps keep you comfortableGrippy rubber cork blend soleConvertible backstrap with adjustable metal pin buckleFootbed made in GermanySpecsUpper material: SuedeSuede is a split leather with a napped finish. It has a velvety surface and is very soft to the touch. It also boasts a high moisture absorption capacity.Insole: SuedeNatural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material.Footbed material: CorkCork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning.Outsole: RubberBecause of its high elasticity rubber is very well suited for outsoles. Thanks to this property it supports the natural rolling motion of the foot. Rubber is also very robust and has good cushioning.