This is one of my favorite hair-care products, a leave-in heat-activated reconstructing milk for weakened hair. The climate in Utah is incredibly hard on my hair and leaves it brittle, dry and unmanageable. I apply the tiniest amount of this product after a shower, and when I blow it dry this makes my hair feel smooth and relaxed. Also, it has the most amazing smell, like I'm dousing my hair with fresh grapefruit. It smells so good I have a hard time not eating it. You can get it for $34 from the Kerastase website, which might seem like a lot of money for a hair-care product, but because it's so concentrated this whole bottle will last me more than six months. Love it, love it, love it.