Cold Derby is a dress shoe crafted with traditional craftsmanship. The body is sanded and the sole is hand-stitched. The entire upper is made of rare and expensive material: fetal calf leather, which is very soft and comfortable to wear on foot. The lining is made of sheep leather, which is soft to the touch, moisture-proof, and breathable. The bottom is made of leather and rubber, preventing slipping when it rains.