For Greasy Roots
We all know (and love!) to use dry shampoo for those late mornings when we don't have time to shower—so it should come as no surprise that it's also an amazing humidity-fighting tool for summer. It adds thickness to fine hair and sucks up the humidity, explain Friscioni and Frielich.
Oscar Blandi Pronto Invisible Volumizing Dry Shampoo Spray, $5-25; ulta.com