New never used Just For Men Control GX Gradual Gray-Reducing Shampoo is perfect for dark shades. This innovative shampoo gradually reduces gray with each wash, leaving hair looking thicker and fuller. Ideal for maintaining a natural look. NWOT comes from smoke free home. Thank you for visiting my closet. Any questions leave me a comment. The product is intended for use on brown to black hair. The shampoo works by slowly bringing the hair back to its natural shade, providing a subtle, natural-looking result. The product is available in a 4 fl. oz. size.