“Starting at the crown, hold your roots up and spray the powder at the base of the root,” says hairstylist Brooke Clarke. “Repeat until the desired amount is in your hair, then rub it in gently with your fingers.” You can wear your hair down or style it afterward. Either way, this technique leaves hair at the root slightly gritty, which allows you to re-puff your hair as needed.  “Brush and fluff your hair to its full capacity, then give it a little upside-down blow-dry and your best hair flip,” advises hairstylist Katelyn Ellsworth, founder of The Roslyn. “Next, spray into the crown following the part line. This vanishes any gray hair or any sparseness in the crown. Finish with your favorite hairspray and you instantly have fuller looking hair that will stay through the night.” There are also powders and sponge-on products you can try.