Pureology Hydrate Shampoo and Conditioner ($27 each, pureology.com for salons)
If your hair is colored or dry (or let’s face it, both), this shampoo and conditioner duo is worth the splurge. The iridescent purple shampoo is concentrated, so you only need a tiny amount to whip up a rich, luxuriously scented (but not overpowering) lather. The peppermint-infused conditioner detangles like a dream and makes our hair shinier than any other we've tried. And since the brand specializes in color-preserving products, we consider them an investment in the longevity of our hair’s hue.
Read more: How to Wash Your Hair—The Right Way