It's officially midsummer and if you're like us, your hair is starting to show signs of all that summer fun: sun, sea and chlorine damage. Just about the only thing keeping our head above water? Deep Repair Masque by Macadamia Natural Oil. A small amount applied to clean, damp hair and left for up to 10 minutes is enough to reap the benefits of all the oil's naturally nourishing fatty acids. Not only does it smooth damaged ends and leave hair shinier, it also adds natural UV protection—so you can get back out there. $28 for 8.5-ounces, available online at macadamiahair.com.