What it is: Kristin Ess Anytime Anywhere Recovery Balm ($14)
Why you need it: If powdery dry shampoos creep you out, pick up this portable little balm. You'll be glad it can fit into even the tiniest going-out clutch, because it's an amazing pick-me-up for dull strands. It works to tame flyaways, soften split ends for those who are in between hair appointments, and give hair sticky-free shine.