ELI5: Explain Like I'm 5

Dry shampoo

Dry shampoo is like magic powder that makes your hair look clean and not greasy without having to wash it with water. You just sprinkle a little bit of the powder onto your scalp (where your hair roots are) and then rub it in with your fingers. The powder soaks up the oil and dirt from your hair, so it looks and smells nice and fresh again. Dry shampoo is especially useful when you don't have time to wash your hair in the shower or if you want to make your hair look nice and voluminous.