Lanolin is a “wool fat acid” that is extracted from sheep wool and it has very impressive features. With the right amount (= 1%), the Lanolin oil lubricates the “living” fibers in fine materials like silk and cashmere and protects them from drying out. Applying the Lanolin also makes the fibers withstand dirt and water during future usage. This means that after using Steamery Delicate Laundry Detergent a woolen sweater or a silk dress will actually repel water and dirt.