Find the Right Conditioner Like multipurpose shampoo, conditioner is now formulated to do much more than its primary (hydrating) duty. In fact, pros such as Stefano Oliveri, a stylist at Lepine New York hair salon, consider it the top tool in their arsenal: "Conditioner can help you add volume, beat the frizzies and generally make your hair behave," he says. The trick is finding the one that's your perfect match.