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!
  • Product orders $50+ and all monthly box brands ship free
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

25 Reviews
4.2 out of 5 stars
5 Star
15
4 Star
4
3 Star
4
2 Star
1
1 Star
1
Hair type
Curly
Dry
Fine
Frizzy
Kinky
Normal
Oily
Straight
Thick
Wavy
Hair color
Brown
Blonde
Black
White or gray
Red
Other
Age
17 & under
18-24
25-34
35-44
45-54
55 & over
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Most Helpful Customer Reviews

Amazing conditioner

I LOVE this shampoo. It's extremely expensive and I'm still not sure that it's 3X better than any other shampoo, even though except the Aveda stuff I've used, it's 3X the price, but it does smell really good and feel very luxurious. I don't think it's made a huge change in my hair though (my Organix stuff actually works pretty well), but it's only been 1 week. I will definitely buy this again, although the price means that I might only get it a few times a year.

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Great product, terrible package

I love how this conditioner makes my hair feel, but I have to deduct points for the horrible, wasteful design of the container. It makes it virtually impossible to get the "leftovers" out after you can't pump any more. This stuff is so expensive already, that it feels like adding insult to injury that they make it so that you can't use all of the product.

Also, when I first tried to use it, I realized the pump on mine was defective. I took it off, but the hole is so small even my skinny fingers can't get in there to scoop up much conditioner. So now I'm stuck trying to figure out how I will be able to use it. I will not reorder this product unless they change to a more normal, economical, design.

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my favorite

this is by far my favorite shampoo of 2013, 2014, I evd a sample in my box and have been using it since. smells great very light feeling I even use on my 2.5 yo daughter

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Best conditioner ever!

I have very dry hair and am always looking for the best conditioning products. This is by far my favorite of any I have found! It is very concentrated too so very little is required to use. I have never used so little product - nor have I had as much satisfaction with the results. What a fantastic product!

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Looks fancy, but does it really do anything?

Maybe I'm using the product wrong

Maybe I'm not using enough, or using too much

But I'm halfway through the container and my hair doesn't seem/feel/style much differently than before. I expected to use it for 4 weeks and think, Wow! This stuff is amazing! But I'm just not feeling that way, and I feel like for the price I should really feel that way.

I still like the detangler though.

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Good Conditioner

I really like this brand of products, but I had never tried this conditioner. It really does moiserize and detangle my think color treated hair. I'm not sure I love the smell of this product though. It's a unique smell. However, I love the smell of many of the products in this brand so this surprised me a little. Worth a try if you like a deep conditioner that really detangles.

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Can't get over the smell

I ended up giving this away. I think the conditioner itself works fine, nothing special, though. The con was the smell. As someone before me wrote, and I agree, it has a very masculine scent. Spicy, maybe? I was very surprised that this was an issue, because I have 3 other no. 4 brand products and haven't just been content with the smell of the products, I've loved 'em!

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Do you like straw?

I should have known. I read the reviews of their shampoo with so many people saying that it made their hair feel like straw and that the smell was terrible. How could conditioner be the same? How could conditioner anti-condition your hair? My hair is more soft and conditioned after shampooing than after rinsing this product out of my hair.

Also... the smell is not just bad. It's the exact same scent as Marc Jacobs original perfume and in very high concentration.

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Conditioner

I really enjoyed this shampoo so I bought the matching conditioner. I really like how soft it makes your hair. The only negative thing I have to say is that I really enjoyed the scent of the shampoo but the conditioner is slightly different.

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Product with a presence

This is a fantastic product. I keep in mind that a little goes a long way and you won't be too disappointed when you see the tiny bottle. This conditioner leaves my hair silky and shiny and bouncy. It's perfect. It is very heavily fragranced though and smells a tad masculine.

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