2Pk Olaplex No.4 Bond Shampoo 250ml/8.5 oz

I love what this shampoo does for my hair and how it makes my hair feel and behave. The scent is also very pleasant and barely noticeable. It's definitely up there in price, but after my hairdresser used it on my hair, I had to buy my own bottle. The good thing is that it really lathers up so you only need a tiny little bit of it each time. I think it will last longer than the other rather expensive shampoos I've been using, such as AG and others. My hair is fine, a bit past shoulder length, and I color it. I used to do highlights, but that became too damaging so I just went to a medium brown color and now only do the roots about every 6 weeks. Even this mild routine is hard on my fine and fragile hair, so I needed to try something different. I really do see a substantial difference in my hair with this shampoo, and it's not just hype. It makes my hair soft and not so flyaway, although since I also use the Olaplex 5 conditioner and #6 leave-in styler (which seems more like a leave-in conditioner), plus the #7 oil for the very ends, so all of these products together really make my hair behave and look better. Due to the price (ouch!), I'm careful to not waste any of the products, but from what I'm seeing after about 6 to 7 weeks of use so far, they will last quite a long time. Highly recommended, and definitely better for me than anything else I've used.