Understanding the Pin Diagram of an RGB LED Guanto Calf Leather Loafers. Stripping back the unnecessary, this unlined masterpiece focuses entirely on the buttery suppleness of premium calfskin. A dimensional metal emblem provides a sharp contrast to the soft, rounded lines of the artisanal construction. It offers the refined feeling of a second skin. Three dimensional metallic house emblem Unlined construction for superior flexibility Integrated comfort elastic bridge strap