At this point most of us are wise to the magic of a spritz of dry shampoo when you just can’t be bothered to wash your hair. Dry shampoos contain ingredients like starch, talc and sometimes alcohol to soak up oil and product and make hair smell clean(ish). They are also great volumizers.
But the classic spray or powder formulas can sometimes leave a visible residue, sometimes don’t have quite the oomph that thicker or curly hair needs and sometimes can make dry hair feel even drier. Enter dry shampoo foams, a newer formulation that contains water. Wait? What? Isn’t dry shampoo supposed to be, like, dry?