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

2,056 Reviews
3.7 out of 5 stars
5 Star
643
4 Star
616
3 Star
476
2 Star
161
1 Star
160
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Most Helpful Customer Reviews

Conditioner

SMALL amount in the sample but just a little bit worked AMAZING in my hair!

5
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Fabulous

Love this conditioner. Wish I would have watched the how to video on Birchbox first because I used way too much the first time and now out of my sample :( A little bit goes a long way. Left my hair so soft. I love it.

5
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Love It

Small sample, but I tried it out combined with the shampoo...and I think I'm sold. Great scent and left my hair feeling clean, light, moisturized, yet with good volume (and I have fine hair). Will be planning on buying the full sizes.

4
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it's Alright

It works as well as any other conditioner. But I am not a fan of the scent.

3
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fragrance too strong

The conditioner left my hair soft. It wasn't heavy or oily. The fragrance is nice but it is too strong for me. i had to rewash my hair.

4
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A bit heavy for fine hair

Made my fine hair super soft, but it weighed it down.

3
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Conditioner

This conditioner combined with the shampoo made for a great pair.

4
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Just okay

This did not do anything wonderful to my hair, overall I found it to be a just okay product and nothing remarkable. I used the shampoo and the conditioner together.

3
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Better hair now
Purchased

Best conditioner for dry hair. Noticed a difference after two applications. Like the feel and smell.

5
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makes my hair super soft

I received this in my other birchbox account and I love it! Number 4 makes great products that leave the hair super soft. Smell is decent.

5
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