A product formulated specifically for curly hair, "best dry shampoo for curly hair" signifies a shampoo that can cleanse and refresh hair without the use of water. For example, R+Co's Death Valley Dry Shampoo is designed to absorb excess oil and dirt, leaving curls looking refreshed and voluminous.
Dry shampoo is particularly beneficial for curly hair, as it can help to extend the time between washes, preserving natural oils and preventing frizz. Historically, dry was first developed in the 19th century as a way to clean hair without water, and it has since become a popular styling product for all hair types.