Foster - Men's Blue Calf Leather Derby Shoe is constructed on our signature last 61731. These derby shoes feature a open lacing system and dainite sole. A blue calf leather derby shoe with goodyear construction is a combination of style and refinement. The goodyear construction is known for its durability and grip, making it ideal for all weather conditions. The green color provides a classic and versatile look. These derbies are suitable for both formal occasions and every day wear.