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
:)

I loved it. It is nice and smooth and clear i love it i wish i still had some left.yay

4
Was this review helpful to you? Yes | No 3 of 3 found this review helpful. Was this review helpful to you? Yes | No
Works great
Sampled

I used this when my hair needed a boost. It made my hair look much healthier, softer and smelled nice.

4
Was this review helpful to you? Yes | No 3 of 3 found this review helpful. Was this review helpful to you? Yes | No
Works!
Sampled

After using this product, my hair felt smooth and shiny. I don't usually like leaving products in my hair but this was easy to use and I can tell it really works. I highly recommend it!

5
Was this review helpful to you? Yes | No 4 of 4 found this review helpful. Was this review helpful to you? Yes | No
Wasn't that fantastic
Sampled

I was very excited to use this, but my expectations were a bit high. It weighed down on my hair, and made it feel detergenty.

2
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Fantastic hair masque!

Left my hair super soft and shiny, will definitely be purchasing the full size!

5
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Worked great
Sampled

This was a fantastic sample. Product smells great and left my hair feeling very nourished. Felt a difference. Product is pricey but you don't need to use very much at a time as it is highly concentrated. Highly recommended.

4
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Heaven to my hair
Sampled

I love this whole line. Professional grade products. A little goes a long way because it lathers so well. Leaves your hair smelling so good even my husband said something.

5
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Smells nice, doesn't do much
Sampled

I didn't notice any real difference in my hair after using this. It seemed softer and well conditioned in the shower, but once out and dry, my hair seemed the same. I love No. 4 products and use their leave in conditioner all the time, but this didn't do it for me.

3
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Super Rich Moisturizer

This product was a nice complement to the clarifying shampoo of the same brand, smells fresh and my hair was oh so soft.

5
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