Elblag - Men's Black and Blue Calf Leather Derby Shoe with blue toe cap is constructed on our signature last CX. These derby shoes feature a open lacing system and dainite sole. A dark brown calf leather derby shoe with a cx sole is a combination of style and refinement. The cx sole is known for its durability and grip, making it ideal for all weather conditions. The black color provides a classic and versatile look. These derbies are suitable for both formal occasions and everyday wear.