Dry Shampoo is available in Rite Aid/CVS/Wal-Mart/Walbaums/any store like that as far as I know. I like the Tresemme Dry Shampoo. You spray it lightly on the roots of your hair and/or on your bangs (basically, the parts that are greasiest) and it soaks up the excess oils so your hair feels like you just washed it. It usually saves me an extra day between washing my hair. You can also use it on days where your hair is still dry and not-oily to give your hair a little more volume.