Editor's TipEditor's Tip

Keep hair healthy from start to finish with Number 4 Birchbox Exclusive Hair Revival Kit.

Number 4 Hair Care

Birchbox Breakdown

Situation: Your hair is dry and brittle and you’re a few weeks (perhaps a few paychecks) away from a trim. Solution: This super-hydrating leave-in treatment. Soy protein works to reconstruct and strengthen hair while natural conditioners like shea butter, jojoba seed oil, and sunflower oil nourish and moisturize—leaving our hair soft, shiny, and in far better shape than it was before.

How to Use

After shampooing, wring excess moisture from hair. Apply evenly to hair starting at the ends and working your way upward to your scalp. Wait for two to five minutes, then rinse thoroughly.

Water, Cetearyl Alcohol, Cyclopentasiloxane, Dicetyldimonium Chloride, Polysorbate 60, Glycereth-26, Behentrimonium Methosulfate, Brassicamidopropyl Dimethylamine, Cetrimonium Chloride, Lactamidopropyl Trimonium Chloride, Cyclohexasiloxane, Fragrance, Divinyldimethicone/Dimethicone Copolymer, Amodimethicone, Cetrimonium Bromide, Jojoba Esters, Methyl Gluceth-20, Panthenol, Behentrimonium Chloride, Dimethiconol, Gluconolactone, Citric Acid, Guar Hydroxypropyltrimonium Chloride, Hydrolyzed Soy Protein, C11-15 Pareth-7, Sodium Benzoate, Butyrospermum Parkii (Shea Butter), PEG-45M, Polyquaternium- 37, Laureth-9, Propylene Glycol Dicaprylate/Dicaprate, Glycerin, Benzyl Salicylate, Hydrogenated Vegetable Oil, Mangifera Indica (Mango) Seed Butter, Butylphenyl Methylpropional, Trideceth-12, C12-13 Pareth-23, C12-13 Pareth-3, Linalool, Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde, Cocos Nucifera (Coconut) Oil, Simmondsia Chinensis (Jojoba) Seed Oil, PPG-1 Trideceth-6, Helianthus Annuus (Sunflower) Seed Oil, Sodium Ascorbyl Phosphate, Macrocystis Pyrifera Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Arctium Lappa Root Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Ilex Paraguariensis Leaf Extract

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

Amazingly awesome!!
Sampled

One of the best products I have received thus far during my one yearsubscription to Birchbox! Light weight, non oily, and leaves my hair looking super awesome and feeling soft. Not to mention I do not have a single tangle when it comes time to comb out my hair! A+ for this one!

5
Was this review helpful to you? Yes | No 17 of 21 found this review helpful. Was this review helpful to you? Yes | No
Alright I guess
Sampled

Didn't notice much of a difference. I don't think I would buy this product. Thank goodness that birch box lets us sample!

2
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Very shiney hair!
Sampled

This product makes my hair really soft and shiney. The only problem is that I am unable to do anything with it after I use this treatment. But worth it!

3
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Love it!
Sampled

I was in between cuts and loved using this product. It definitely helped restore some hydration to my tips. I felt my hair softer and shinier.

4
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Liked it a lot!
Sampled

I am normally a sucker for hair masks, and I liked that I had the chance to try this great mask by Number 4! Keep 'em coming! :)

4
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Great with the Shampoo
Sampled

I received this along with the shampoo sample and took it along on vacation too... it was great! The single foil packet was good for three or four uses (you don't need much!) and it left my hair soft. It was great for a trip where I subjected my color-treated hair to a lot of sun and chlorine :)

4
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Love it!
Sampled

This stuff made my hair feel so soft! And I was able to hold off a much needed trim for a little while longer. I will definitely be recommending this to all my friends with hair!

5
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ok
Sampled

the mask was just ok, it seemed to make my hair a bit greasey. I also have longer heair and the sample size was definitely not enough!

1
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Super hydrating
Sampled

I'm not usually into leave-in treatments because they tend to make my hair super greasy, but this masque was nice! My hair felt really soft and healthy after trying it just once. Not sure I would buy the full-size, but definitely impressed!

4
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Good Product
Sampled

I have really curly hair and I am always looking for a great product. After using the masque I did notice that my hair was smooth and there was less frizz.

4
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