Berke - Men's Burnish Blue Calf Leather Derby Shoe feature a open lacing system and leather rubber sole. A burnish blue calf leather derby shoe with a leather rubber sole is a combination of style and refinement. The leather rubber sole is known for its durability and grip, making it ideal for all weather conditions. The burnish blue color provides a classic and versatile look. These derbies are suitable for both formal occasions and everyday wear.