Why: You're not in college anymore, and it's not cute to have ratty hair. Even if you don't have time to do your hair in the morning — after all, you need to run from SoulCycle to a 9 a.m. meeting — you can still brush it and pull it back into a bun. But you can't get that really sleek, chic look without the right hair tool. A grown-up brush is going to help you improve your at-home blowouts, distribute oil from your scalp to your ends, and, of course, create a polished topknot.
Try: Is the famed Mason Pearson brush ($205) worth it? Yes, yes it is. A friend of mine who just turned 30 received one as a birthday present and could not stop gushing about how shiny and maintained her coif has been since she added it into her regime. The English brand has been making brushes since 1885, and by now it has perfected the premium-grade boar bristle brush (note: it also offers a luxe scalp massage).