3D Upholstery & Carpet Shampoo contains an optical brightener to bring out the original color of your interior cloth and carpet, while leaving no residue. It has a fresh lemon scent. When extractors are not available, this is the product for hand cleaning your interior cloths and carpets. The key to proper use of this shampoo is to allow the product’s suds to penetrate into the fabric fibers lifting ground in soil up to the surface. This product is hypo allergenic and will not cause allergic reactions upon skin contact. If you have a large amount of carpet to clean, you can use a brush on a dual action polisher.