Dry shampoo is a super-fine powder that comes in a sifter bottle or aerosol can. It absorbs the oils in the hair and scalp and also removes the pollutants that are attached to the oils. After applying the shampoo and allowing it to absorb, you can shake, brush, or comb out the residue. This option is solely a means of temporarily cleaning the hair and scalp and should not be viewed as a replacement for washing with water. If your schedule is forcing you to stretch your wash day, check out the top 15 dry shampoos below.