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 12,415 Reviews 12,415 Reviews Write a Review
  • $58.00 includes Free Shipping
  • 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

More for You!

Product Reviews & Sample Feedback

12,415 Reviews
4.0 out of 5 stars
5 Star
4630
4 Star
4620
3 Star
2245
2 Star
582
1 Star
338
my profile
people who
purchased
sampled
Hair type
Thick
Fine
Straight
Wavy
Curly
Frizzy
Kinky
Dry
Normal
Oily
Hair color
Brown
Blonde
Black
White or gray
Red
Other
Age
17 & under
18-24
25-34
35-44
45-54
55 & over
Apply

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
soft locks
Sampled

This product left my hair so silky smooth. It was tangle free...absolutely no tangles and I have thick curly hair. I like this brand because their products are very lightweight and actually feel cleansing.

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Great for the Hair

So easy to use and works great! Gives my hair that extra boost that it needs. Nice sample size

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Worked and Smelled Great
Sampled

My hair is very fine so I get worried that products like this would weigh it down too much, but this product was light enough for me to keep my volume while also working to repair my hair.

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
smells great
Sampled

Smells very nice. Made my hair very soft. Sample was only big enough for one use. Not sure if I will be buying the full price because it is so expensive.

4
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Loved it!
Sampled

Literally the only thing I didn't like about this sample was that because I have super thick, long hair, it wasn't enough. But that says nothing about the product.

I'm a big fan of moisturizing treatments, and this one did not fall short! Smells wonderful, texture and thickness is wonderful, and worked wonderfly! I have to say that the price is a bit costly, but then again, it's a great and effective product!

4
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No