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.

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

4.2 out of 5 stars, based on 257 reviews 257 Reviews
4.2 out of 5 stars
5 Star
131
4 Star
71
3 Star
31
2 Star
13
1 Star
11
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

Masque

The Reconstructing masque made my hair so soft and shiny, I loved the way my hair looked after it dried. And it didn't have any kind of smell, so I did not like that..

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good stuff
Sampled

works excellent on my hair but a little too pricey for me

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phenomenal

THis product totally changed my hair! I have dry brittle hair but this masque made it feel so healthy and fresh! I love it and would recommend it!!

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Amazing
Sampled

What a great find!! I have finally found a mask that does not leave my hair with residue. A lot of masks leave tons of oil in my hair but this one really works!

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Wow
Sampled

This is so luxuriois! Too expensive for me to buy but I can tell that it is intensely nourishing!

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Don't normally use products like this
Sampled

I hardly ever buy products like this but I liked it. It made my hair softer but I probably wouldn't purchase this again.

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Works well
Sampled

I liked the scent of this product and I feel like it made my hair softer and less frizzy

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HAIR Masque
Sampled

I'm thinking maybe the instructions weren't clear enough, as some seem to be using this on their face and not their hair...If you haven't tried this sample yet, know it is meant for your hair.

I loved this. Unfortunately, the scent is so strong, I can't handle using it again. It's disappointing, because it left my hair so soft and silky. Powers That Be, PLEASE make a version with a less-powerful scent!

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good product
Sampled

i liked sampling this brand. It worked great and I may buy in the future

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Left hair dry
Sampled

I used the sample from my box this month and didn't have much results from the product. My hair was left feeling dry still after using it. I have long hair though and may not have been able to get enough of the product for all of my hair.

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