The original Doc Baily’s Leather Black actually contains a dye pigment that restores lost color. It also cleans, nourishes and waterproofs. Doc Baily's Leather Black gently cleans leather with specially formulated detergents which actually lift dirt out, opening the pores of the leather, allowing the lanolin oil to flow into the leather, nourishing and softening it. Doc Baily's Black actually penetrates deep into the leather to restore lost color. As a finishing touch, a special wax locks the color in, which protects and waterproofs your leather.