Some days you just don't have time to shower and shampoo. Look fabulous on the fly with a few sprays of TRESemmÃ© Unscented dry shampoo. Effortlessly refresh hair for that fresh look and feel-even if you don't have the time for a shower-with TRESemmÃ© Unscented Dry Shampoo. This unscented dry shampoo works on all hair types, even if you usually use a shampoo for oily hair. It works by removing excess oil and impurities all the while helping eliminate odor, leaving your hair rejuvenated.