Number 4™ Volumizing Shampoo - 8.5 oz

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.

Number 4™ Volumizing Shampoo - 8.5 oz
3.8 out of 5 stars, based on 5,102 Reviews 5,102 Reviews
3.8 out of 5 stars
5 Star
1637
4 Star
1830
3 Star
1083
2 Star
292
1 Star
260
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Great shampoo

This shampoo works very nicely. I only shampoo a few times a week and I am always happy with how my hair feels after using it. Great product - but I feel like it's pretty expensive.

5
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Number 4™ Volumizing Shampoo

The Number 4 products are great. I like the volumizing shampoo, but will probably purchase the clarifying. It suits my needs better. Still all in all, a great product.

5
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Effective shampoo!!

I have very fine wavy hair and this product gives me great volumes and helps boost my waves/curls! And a little really goes a long way!!

5
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Bigger than Texas

I really enjoyed using this product and the volume it produced in my hair!!! I love when a product can give you more than just a little volume but LASTING volume!

5
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Very Nice

This was a very nice shampoo. I will defiantly purchase this in the future. It made my hair feel nice and smell great.

5
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WOW!

As a psoriasis suffer I am hesitant to try new shampoo on my scalp. I gave this one a shot and I could not stop touching my hair all day! It did not irritate my scalp and my hair was full and so soft. As soon as I am out of shampoo, this will be my next purchase on Birch Box.

5
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Love!

Volumizing shampoo is a necessity for those of us with thin hair. This smells great, is weightless and helps give my hair a little oomph.

5
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no 4 brand

I absolutely love this brand and their products. I am brunette with sensitive scalp and hair, but their shampoos are very agreeable with my hair. Yes they are pricey, but bottles go a long way.

5
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Great

This smells delicious and a little goes a long way. Definitely works.

5
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Love!

This shampoo was amazing!! My hair was full of volume even without product. Definitely buying this shampoo!

5
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