Editor's TipEditor's Tip

You can use this mild shampoo every day without worrying about drying out strands. For best results, follow with L’eau de Mer Hydrating Condition and use Lumiere d’hiver Reconstructing Masque once a week.

Number 4 Hair Care

Birchbox Breakdown

Whether your hair is over-processed and brittle or just chronically dry, this is the shampoo for you. The satiny formula is gentle enough to use every day and helps to soften and hydrate strands with natural essential oils and extracts. Free of parabens and sulfates, it foams into a rich lather that leaves hair soft and shiny. Vitamin B5 conditions hair and silicone bumps up the gloss factor, while the brand’'s patented Liquid Complexes help protect, purify, strengthen, and revitalize hair.

How to Use

The concentrated formula goes a long way. Depending on hair length and thickness, apply one or two pumps of shampoo to your and work into a lather. Work into wet strands and rinse thoroughly and follow with Number 4 Hydrating Condition.

Water, Sodium Cocoyl Isethionate, Sodium Lauryl Sulfoacetate, Cocamidopropyl Hydroxysultaine, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Sarcosinate, Cocamidopropylamine Oxide, Fragrance (Parfum), Divinyldimethicone/Dimethicone Copolymer, Glycereth-26, Glycol Distearate, Gluconolactone, Disodium Cocoyl Glutamate, Lauryl Alcohol, Decyl Glucoside, Quaternium-91, Panthenol, Guar Hydroxypropyltrimonium Chloride, Amodimethicone, PPG-3 Benzyl Ether Myristate, Sodium Benzoate, PEG-120 Methyl Glucose Dioleate, Sodium Cocoyl Glutamate, C11-15 Pareth-7, Trisodium Ethylenediamine Disuccinate, Laureth-9, Glycerin, C12-13 Pareth-23, C12-13 Pareth-3, Polyquaternium-7, Dihydroxypropyl PEG-5 Linoleammonium Chloride, Trideceth-12, Linalool, Helianthus Annuus (Sunflower) Seed Oil, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Sodium Ascorbyl Phosphate, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Grossularia Fruit Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Arctium Lappa Root Extract, Avena Sativa (Oat) Kernel Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Cymbopogon Schoenanthus Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Hydrastis Canadensis (Golden Seal) Root Extract, Ilex Paraguariensis Leaf Extract

More for You!
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Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

Giving it a try.

I liked the fact that it lathered up really well, but the smell bothered me. Still, it did seem to moisturize my hair so I might try it again.

4
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Number 4 Hydrating Shampoo

This product is great for curly hair. It is very moisturizing and cleans well without being too harsh. It also appears to be gentle for color treated hair. Leaves hair and scalp feeling clean and soft and not greasy or oily at all.

5
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Didn't work

This did not work for me. My hair was so stiff and felt extremely dry after using. Did absolutely nothing for my hair.

1
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Number 4 Hydrating Shampoo

This product has an amazing smell. This is also very hydrating as the title implies. I love this product.

4
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Love it!

Makes my hair feel amazing and it even makes styling my hair easier.

5
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Fresh and effective

I really love this whole line of products. I have used another type of number 4 shampoo with great results. This is another great option. It is effective but not too harsh. I was able to go 1 day longer without needing to shampoo. And I love the fresh scent. Great product.

5
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love no4 products

Great shampoo and it smells amazing. I will definitely be purchasing in the future

5
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smells great

loved this shampoo. smells like heaven. it felt wonderful lathering up my hair. I want the conditioner too!

5
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Nice shampoo

This shampoo made my hair feel very silky and look quite smooth. The smell is a little medicinal, like all of the products I've gotten in my Birchbox from this brand, but overall, a fine shampoo.

4
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Refreshing!

This shampoo smells so great and left my hair feeling really soft, even without conditioner.

5
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