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This sulfate-free shampoo proves that style and substance aren't mutually exclusive. The sleek packaging and fresh scent are a nod to Parisian flair, while the scientific formula is designed to turn fine, flat strands into rich, full-bodied hair. The brand's four signature Liquid Complexes—blends of natural extracts—work to protect, strengthen, and purify strands without weighing them down.
Best smelling shampoo I've used. Fresh scent and cleans without residue. Love it!5
In love with the smell! Leaves my hair full and soft and smelling so sweet and clean! I love all no.4 products!5
Great smell and works well. I like that it doesn't weigh my hair down.
I would recommend this product to my friends definitely!
This is the third shampoo I have received from Number 4 and I have loved them all! This shampoo does what it says it will. It gave me great volume and softness! Keep sending these samples my way Birchbox!!!5
I really love this stuff!!! Wish the sample was a little bigger but it's great! I will definitely try the other products in the future!5
I love this shampoo, it's not heavy, so my hair naturally waves and looks like I spent a lot of time on it. I will be buying this product as soon as I get done with his review!5
Worked great! Left my hair soft, came with plenty to try it multiple times. Smelled lovely as well. I will definitely think about purchasing.5
Smells fabulous. No yucky ingredients. Hair felt great. This one is a winner - I'll be purchasing this product and more from this line soon!5
I really enjoyed this shampoo, however I have thick, long hair and wish I would have had the opportunity to use it a few times in a row. I liked it enough to purchase it and try it for a longer period of time.5
This is the first shampoo that I would leave my Nioxin for! I've been using that shampoo for at least 13 years, and never thought I would use anything else. I looked forward to getting in the shower and shampooing my hair everyday with #4 Volumizing Shampoo. It felt so rich, and the results were so great. If you have fine, thin hair don't miss out on this one.5