What exactly is this item? The most secure and efficient method to get rid of unwanted hair colour is COS technology. By making the dye molecules smaller, COS corrects and eliminates the colour in about 20 minutes, making it easy to wash out of the hair. More details Since COS's exclusive solution completely eliminates all synthetic pigments from the hair, levels are not a concern. There are the following product options: Size: Powertools, 4 oz. Color Out System (COS);

What is this product? COS is a technology that is the safest and most effective way to remove undesirable hair color. In just 20 minuets, COS corrects and removes the color by shrinking the dye molecules, allowing it to be simply washed out of the hair. More info: Levels are of no concern as COS's unique bleach and ammonia free formula removes all artificial pigments from the hair. Product Options Available are as follows: Size : 4 oz - Powertools COS Color Out System.