Editor's TipEditor's Tip

Afraid of commitment? Start slow with an 8.5 oz bottle.

Number 4 Hair Care

Birchbox Breakdown

This singular 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. (No strings attached.)

How to Use

Emulsify in hands and massage into wet hair. Lather. Rinse. Follow with Volumizing Condition.

Water, Sodium Lauryl Sulfoacetate, Sodium Cocoyl Isethionate, Cocamidopropyl Hydroxysultaine, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Sarcosinate, Cocamidopropylamine Oxide, Disodium Cocoyl Glutamate, Fragrance, Glycol Distearate, Polyquaternium-10, Gluconolactone, Lauryl Alcohol, Panthenol, Aminomethyl Propanol, Sodium Benzoate, Sodium Cocoyl Glutamate, Disodium EDTA, Helianthus Annuus (Sunflower) Seed Oil, Glycerin, Macrocystis Pyrifera Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Arctium Lappa Root Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Ilex Paraguariensis Leaf Extract

More for You!
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

209 Reviews
3.9 out of 5 stars
5 Star
80
4 Star
67
3 Star
38
2 Star
15
1 Star
9
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Most Helpful Customer Reviews

Volume Shampoo

I received this product in my April box and was excited to try it out. I have pretty thin hair, my ponytail is only a quarter size, but I also have pretty long hair. I can use all of the help I can to get my hair to be anything but flat. This product did an ok job and was a nice base to start with. However, it did leave my ends relatively dry and I had to use more oil to keep it moisturized. I personally wouldn't purchase this product for daily use.

2
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Don't like the smell

Maybe it's me, but I really didn't like the texture or smell of this product. I also had trouble getting it to lather.

3
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volumizing shampoo

This shampoo smelled nice and lathered great! Cleaned my hair well. However, I didn't notice much if any difference as far as "volumizing."

3
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Me likey

I wasn't a huge fan of the other products I had received from Number 4, mainly because of the scent but this shampoo did what it said it would do, added volume! Plus I like that it's sulfate-free!

3
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Works so well and smells phenomenal
Purchased

I went from a wash my hair every day to twice a week, thanks to this shampoo. My hair has never looked or handled better. Only a small amount is needed to produce a large amount of lather. This is now my full time shampoo.

5
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Great Shampoo

I left me hair soft and shiny. I really enjoyed the scent as well. For being a volume shampoo, I didn't get a lot of volume. For the price I think the volume needs to be bigger.

4
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can't get enough
Purchased

I love the smell, first and foremost. This shampoo also lathers up better than anything I've ever used, ONE pump(which doesn't look like much shampoo) is more than enough to wash my whole head of hair. my hair feels SO clean after and smells fanstastic!

5
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Smells great and gives you volume

I LOVE this shampoo! It gives my hair so much lift and body while smelling delightful.

I also love the packaging! Highly recommend.

5
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Smells good and does its job well.

Nice shampoo. I probably would not pay for a full-size version considering the price tag. But for those that are willing, I thought it was pretty good (as far as shampoos go).

4
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Meh

I really didn't find this shampoo to be anything special, especially considering the price of the full size. It smells good and does it's job, but I can think of quite a few cheaper alternatives.

4
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