Editor's TipEditor's Tip

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

Number 4 Hair Care

  • 4.0 out of 5 stars, based on 12,438 Reviews 12,438 Reviews Write a Review
  • $58.00
  • 5.1 oz   
  • Availability: In stock

    $58.00

Birchbox Breakdown

Situation: Your hair is dry and brittle, and you'’re still a few weeks away from a trim. Solution: This super-hydrating restorative 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

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12,438 Reviews
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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 18 of 22 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
Was this review helpful to you? Yes | No 3 of 4 found this review helpful. Was this review helpful to you? Yes | No
great stuff!!

i thought this worked very well & had a nice smell to it. i would definitely buy it! The texture was nice & wasn't very heavy in my hair either like other products are. This stuff is definitely worth it to buy!! I can't wait to purchase my own so I have a full size bottle so it lasts me alot longer

5
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meh
Sampled

love that this product is vegan but it doesnt feel like enough was in the packet in order to feel detangled at all.

2
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It was ok

I used this mask but did not see any difference in my hair. I have yet to find one that really helps.

3
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Omg

SMELLS AMAZING. I wish the full size wasn't so expensive or I would get it. Does take a lot to wash my hair though.

5
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I love this brand

this clean simple packaging is fantastic and the products never disappoint. another hit for no. 4

5
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