Editor's TipEditor's Tip

This is one area where matching makes sense. Pair this conditioner with Number 4 Volumizing Shampoo to get the best results.

Number 4 Hair Care

Birchbox Breakdown

Even fine hair needs a good conditioner. This sulfate-free formula detangles and softens hair without weighing it down. You’ll be left with smooth, manageable hair that is noticeably fuller and more dynamic. Did we mention it also smells spectacular?

How it Works

There are zero sulfates or parabens in this formula, but there is vitamin B, which helps to fortify and moisturize strands. It also contains the brand’s four signature Liquid Complexes™, which are blends of natural ingredients designed to help protect, purify, strengthen, and revitalize hair.

How to Use

After shampooing, squeeze out excess water from hair. Apply one or two pumps of conditioner (depending on length), concentrating on mid-shaft and ends.

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

Product Reviews & Sample Feedback

4,408 Reviews
3.6 out of 5 stars
5 Star
1151
4 Star
1426
3 Star
1090
2 Star
369
1 Star
372
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Most Helpful Customer Reviews

great
Sampled

Best product ever! Makes my face so clean and clear! Never using another product again! Such a great little find! Thanks birch box!

5
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I'm in LOVE!!

This brand has the absolute BEST hair care products on the market! Hands down! I would recommend EVERYONE to give them a try. You won't be disappointed.

5
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number 4 volumizing condition
Purchased

I love this conditioner. I learned about this product because of Birch Box, keep finding products like this. I use it everyday, ane I do not find it heavy. Give a great morning wash

5
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Love this
Sampled

I love this and several other No. 4 products. I purchased the Super Comb Prep & Protect, Volumizing Shampoo and Volumizing Conditioner soon after trying in my Birchbox. They are my favorite products which I use everyday. I will continue buying and would recommend to anyone!

5
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good conditioner
Sampled

works on fine hair. i really loved the smell of this brand and the presentation. the size of presentation is really good.

3
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Hair
Sampled

I did not find this product very good at cleaning nourishing and replenishing.

1
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Continued from the shampoo
SampledPurchased

I have yet to use this without using the shampoo, but it does a rather great job of adding volume to my hair. This 8.5oz size is great to try the product and use sparingly, but it simply isn't enough quantity to sustain for very long. The conditioner ran out much faster than the shampoo, nearly 1.5x the usage from a 8.5oz container.
My only question is whether or not I can maximize my utility by substituting for a cheaper shampoo/conditioner alternative and utilize additional hair product to replicate the results I get from this brand.

4
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Average
Sampled

Not enough in sample to use enough to really tell if the product works like it says

3
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another meh product
Sampled

smells good, works okay; nothing special though really. Could take or leave it. Won't be buying again. Was worth the try though. Same performance as their shampoo

2
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Smells good and makes hair soft but does not work well for curls
Sampled

My hair is curly, and I did not find it gave my hair any lift at the roots. However, it does smell very nice and did leave my hair feeling soft.

3
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