The BIRKENSTOCK Boston clog is a veritable classic that can easily be worn all year round. The color-coordinated buckles with a textile feel and a matte design, as well as the color-coordinated outsole, are additional eye-catchers. The upper is made from soft suede. Suede 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. Suede is softer and more flexible by nature and does not have the same stability as smooth leather. The stability of suede also varies from hide to hide. This does not constitute a material or production defect.