Designed for your jeans and dark clothes Woolite Darks cleans all types of fabrics while keeping dark colors bold and vivid. The special formula won t cause fading shape loss and fiber damage so your clothes last longer. Designed for use in all regular and high-efficiency washing machines the liquid detergent dissolves quickly so it does not leave any unwanted residue on your clothes.Woolite Darks offers a gentle effective detergent that protects dark colors from fading during the wash. Dark fabrics will keep their original intense color and stay vivid for a longer period of time. The liquid detergent is easy to measure and does not leave any powdery residue.