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

Number 4 Hair Care

  • 3.9 out of 5 stars, based on 212 Reviews 212 Reviews Write a Review
  • $72.00
  • 25 oz    
  • Availability: In stock

    $72.00

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

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Most Helpful Customer Reviews

My Favorite Shampoo in the Whole World

I used to always think it was a waste to spend tons of money on shampoo and conditioner when there are $0.75 bottle of VO5 out there. But when I sampled this a few years ago from my Birchbox, I could REALLY tell the difference. Compared to using creamy Pantene, when using this natural gel-like shampoo (any Number 4 shampoo) my hair feels nongreasy, cleaner, fresher, and softer throughout the day. I always try to get a deal because this is expensive, but if you are trying to find a difference in shampoos, this one definitely takes the cake. Definitely if I indulge myself, I would buy Number 4 products. Definitely my favorite and I'm obsessed.

5
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Nice Shampoo
Purchased

I received the clarifying shampoo as a sample and loved it so much I bought the full size. While I like it, it's a little too clarifying to use every day, so I thought I'd try this volumizing option and switch back and forth. I DO like the way the volumizing shampoo makes my hair feel, and it lends some additional volume to my long-ish (a couple inches below my shoulders), wavy hair, but I like the scent of the clarifying shampoo better. Either way, both are good products, I just wish the scent was the same!

4
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Ahhhh-mazing!

I got this as a sample in my April box and I really enjoyed the scent first off. I love that you don't need much to get a nice, big lather. I workout every day so I wash my hair constantly. I have thin, straight hair and felt it did give me some added volume. I would have loved to try the conditioner along side it to see what it would have done further.

5
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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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