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 Men's Bonus Shop

Product Reviews & Sample Feedback

2,544 Reviews
3.7 out of 5 stars
5 Star
794
4 Star
818
3 Star
584
2 Star
179
1 Star
169
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Most Helpful Customer Reviews

Love this
Sampled

I have great hair (I know I'm lucky) so most products do fine enough, but this is the first product in my life to make a noticeable and amazing change in my hair. I'll be buying this soon. Also love that it is not tested on animals.

5
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New Conditioner?
Sampled

Similar to the shampoo, it's a great product. It keeps my hair moisturized, and I love the natural ingredients. I would definitely recommend.

4
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Nice
Sampled

I do like the conditioner, and I don't use conditioner. I may have to start, but this is a bit pricey.

5
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Eh
Sampled

Not crazy on this conditioner. I felt it left my hair feeling heavier, and didn't have a great detangle feeling to it. Once applied, I'd grab chunks out of my hair while rinsing out... would not consider purchasing in the future.

3
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worked well
Sampled

it was a very small sample but after the single use my hair was very soft and silky with out being weighed down.

4
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Wonderful
Sampled

This conditioner made my very thin hair smoother and better looking than any product I have ever used. I will be buying a full size soon.

5
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Never thought I'd like a conditioner- I'm a changed man
Sampled

I can count on two hands the number of times I've used conditioner in my lifetime. I received this sample with the hydrating shampoo and it is a one-two punch to awesome feeling hair. My girlfriend loves grabbing my hair after I get out of the shower and have used this conditioner. I personally can feel the difference- normally my hair poofs up really bad.. with this product, it keeps good weight on my hair so that it looks good without any product, and my hair doesn't look puffy when it dries.

Props to the No. 4 Hydrating conditioner.

4
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i like it
Sampled

I really like this, it has a great scent and works pretty well. I would buy this product. totally worth it.

3
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Too small to know
Sampled

I liked the shampoo, which was a larger sample and was able to try it for several shampoos. The conditioner was barely enough for one application. I liked how my hair felt after, but I'm not sure enough to spend that much money on the full size. It would have been better done to have the same size as the shampoo sample.

4
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pretty good conditioner
Sampled

as a conditioner it is quite good and does what it's supposed to but the shampoo already is almost as good as this product so its almost unnecessary. That being said it does making your hair just a little bit more soft.

4
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