My hair is very straight, thick and cut short, now that I have 50% gray hair sometimes the short gray just sticks straight out, especially when I air dry my hair. With this Nexxus product, applying about 5 drops all over and massaging at the roots, those stubborn grays relax and lay down. Also gives my hair the youthful shine it had when I was younger. I have now purchased this product and use it daily. I do have to admit I purchased at a big box drug store, but I had enough reward points with the big box store to get it for free, so I still saved, sorry Birchbox. But I'm a single hard working mom who cuts corners whenever and wherever I can!