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: A super-hydrating leave-in treatment. We’re partial to Number 4’s™ Lumiere d’hiver Reconstructing Masque because it infuses moisture and protein (the two things that hair needs most!) into strands, leaving our hair soft, shiny, and in far better shape than it was before.

How it Works

Soy protein works to reconstruct and strengthen hair while natural conditioners like shea butter, jojoba seed oil, and sunflower oil nourish and moisturize. Don’t forget about the silkiness factor — for that, there’s silicone polymer, which smoothes and detangles.

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 orders $50+ and all monthly box brands ship free
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

257 Reviews
4.2 out of 5 stars
5 Star
398
4 Star
375
3 Star
208
2 Star
48
1 Star
38
Hair type
Curly
Dry
Fine
Frizzy
Kinky
Normal
Oily
Straight
Thick
Wavy
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

Hair Mask

This mask left my hair feeling super smooth and luxurious. So glad to get this in my box this month.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Nice
Sampled

Smells really nice. Made my hair feel really soft.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Just Ok
Sampled

for the price, I would expect this product to work miracles. I found it to be no better than any other conditioning product I've used in the past.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Reconstructing Masque
Sampled

This product made my hair amazing after using it once. It was soft and I barely had any frizz!

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Great product but very pricey
Sampled

This masque made my hair super shiny and amazing. The only reason why I wouldn't purchase is because of the expensive price tag.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Number 4â„¢ Reconstructing Masque
Sampled

I didn't think this masque was anything special. It worked decently, smelled nice, and made my hair soft, but for the price, there are many products on the market for much, much cheaper that are just as effective.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Nice mask
Sampled

The mask was nice, but may not be suitable for individuals with oily hair

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Amazing
Sampled

After using this product my hair was soft, shiny, and incredibly healthy looking.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
It's ok
Sampled

I used this instead of conditioner after using the clarifying shampoo sample that came with this. Hair was easy to detangle in shower and is soft but still frizzy.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
love it
Sampled

this is a great product! My hair looked and felt amazing plus its an ingredient conscious item!!

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