Yucky hair? If you don’t have time to go the whole shampoo, conditioner, volumizing-mousse route, Schwarzkopf’s OSIS Dust It is a quick fix. Points for the packaging: a shaker small enough to stash in your purse for emergency bad-hair moments. All you do is sprinkle the powder onto your palms, rub them together, and then (easier to do than describe) massage the “dust” into the roots for volume ($21.50 for 50 millilitres at Red Room Hair World, Hype Hair Studio, and Sebastian 1 Hair).