Editor's TipEditor's Tip

For a mini hair treatment, leave on for one minute and then rinse as usual. Use the Lumiere d’hiver Reconstructing Masque once a week to keep hair healthy.

Number 4 Hair Care

Birchbox Breakdown

This decadent conditioner helps to bring dry, over- styled hair back to life. It’s loaded with moisturizing natural ingredients that calm frizz and restore fried ends and it also protects from future damage. Don’t tell our hair stylist, but this product is the reason we can go so long in between trims!

How it Works

This rich formula helps to rebuild hair inside and out: vitamin B5 and jojoba help to nourish and hydrate dry strands, while Number 4’s™ proprietary Liquid Complexes™ use potent natural ingredients like acai berry, vitamin C, and black current to moisturize, protect, and strengthen hair.

How to Use

Use on clean, damp hair. Depending on hair length and thickness, work one or two pumps through the ends and mid-length of strands. Rinse completely and style as usual.

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

Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

In LOVE with Number 4

This product is how I wound up on Birchbox!!! I received it as a gift and had to get more of it. It is the best product for my hair - and I, like many of us have been through a lot of them, looking for "the one". Yes, Number 4 products are expensive by compairson, but the way this product makes my hair feel...it's a worthwile indulgence.

5
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Smells heavenly
Sampled

I don't use conditioner more than once a week so I tend to opt for cheaper brands, but this conditioner smells divine, and doesn't weigh too heavily on the hair.

4
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Best Conditioner and Smell
Sampled

I loved the shampoo so much I had to have the conditioner. Both work very well without harmful chemicals. The smell has me addicted. It's the most wonderful masculine yet feminine fragrance. Pricey and worth it when it's time to treat yourself.

5
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de frizz
Sampled

I love how hydrating this conditioner is and how it defrizzes my hair. It also makes my split ends feel less dry. My hair definitely felt less damaged when I used it.

5
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Works great!!! Don't love the smell.
Sampled

I tried this conditioner after I realized my split ends were horrific. My hair looks and feels great now! This conditioner is super concentrated. I don't l e the smell, but others might like it. It smells a bit too masculine for my taste.

4
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Heaven
Sampled

I got this and the shampoo as a sample. This is one of the best conditoners I used so far. It smell slightly like perfume (a good thing). It moisturized my hair and made it soft as soon as i put it on my hair. I let it stay on longer than a minute and my hair was soooo soft and manageable. It even made my hands feel softer. I will definitely be on the lookout for this brand.
-4c afro

5
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Liked it very much
Sampled

Good conditioner, but a little bit heavy for my naturally curly hair. The smell that matches the shampoo is lovely, though.

4
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Good
Sampled

I love the conditioner the most, my hair feels great after useing this

3
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God made this conditioner!
SampledPurchased

Although the smell isn't the greatest, this IS the greatest conditioner I have used. It is worth the price and it comes in a neat little bottle. I don't use much even though I have waist length hair. It makes my hair very soft & frizz free and it lasts for 2-3 days so when I take a day or 2 off from shampooing ( just dry shampoo) it still looks amazing each day. Definitely a must buy and it really does hydrate your hair in a healthy way. Plus it's 100% vegan which is great.

5
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Ok
Sampled

It's just conditioner, not sure what all the hype is about.

1
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