Editor's TipEditor's Tip

For best results, condition with Number 4™ Reconstructing Masque.

Number 4 Hair Care

Birchbox Breakdown

There was a time when we were a bit skeptical about hair oil—the last thing we wanted was a greasy, weighed down ’do. These days, however, we can't imagine a haircare routine without it. This strand-saving elixir gives drab, dull hair a coveted movie star shine (plus a whole host of reparative benefits). Our oil-free days are officially over.

How it Works

Number 4™’s Liquid Complex Culture uses natural botanicals to hydrate, strengthen, and protect hair for sleek, smooth results. Argan and sunflower seed oils condition and strengthen while FluoroSilicones repel hair’s natural oils to maintain lightweight, grease-free shine all day. Number 4™ products are free of sulfates, sodium chloride, and parabens.

How to Use

Distribute one to two pumps through damp hair, then style as usual. For added radiance, apply one pump of product to dry hair. You can also use it to soften cuticles.

Cyclopentasiloxane,C13-14 Isoparaffin,Dimethicone,Dimethiconol,Phenyl Trimethicone,Perfluorononyl Dimethicone,Fragrance (Parfum),Benzyl Salicylate,Butylphenyl Methylpropional,Linalool,Hydroxyisohexyl 3- Cyclohexene Carboxaldehyde,Ethylhexyl Methoxycinnamate,Argania Spinosa Kernel Oil,Helianthus Annuus (Sunflower) Seed Oil,Glycerin,Sodium Ascorbyl Phosphate,Hydrolyzed Soy Protein,Macrocystis Pyrifera Extract,Ribes Grossularia Fruit Extract,Ribes Nigrum (Black Currant) Leaf Extract,Arctium Lappa Root Extract,Avena Sativa (Oat) Kernel Extract,Camellia Sinensis Leaf Extract,Chondrus Crispus (Carrageenan) Extract,Cymbopogon Schoenanthus Extract,Euterpe Oleracea Fruit Extract,Garcinia Mangostana Peel Extract,Hibiscus Sabdariffa Flower Extract,Hydrastis Canadensis (Golden Seal) Root 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

6 Reviews
4.8 out of 5 stars
5 Star
5
4 Star
1
3 Star
0
2 Star
0
1 Star
0
my profile
people who
purchased
sampled
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

clean oil
Purchased

I love this so far! My roots tend to get greasy easily so I am always wary about using oils on my hair. This works perfectly on my ends because it does not have that heavy oily feel. Its lightweight and has a very light clean scent.

:)

4
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
What a Masque!

With straightening my hair all the time I needed something to give back my shine & protiens. After doing this treatment my hair felt healthy and shiny. I loved this sample!

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Love it
Purchased

I love all there products!
Makes my hair smooth,shiny, easy to brush and smells super good! I use 2 pumps after washing in wet hair. This item is not heavy or weigh the hair down

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
I love it

I have to tell a funny story, I got this in my Birchbox and I can't see well and couldn't make out the writing on the small pack. I thought it said it was a MASK so I put it all over my face and then rinsed. My face feels wonderful!! I can't wait to try it on my hair! The next time I will put my glasses on!

5
Was this review helpful to you? Yes | No 3 of 4 found this review helpful. Was this review helpful to you? Yes | No
Love

So good I loved this product made my curly hair calm and shiney! I love that it smells so good as well!

5
Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Weightless Shine

Love it! I have very very fine, long, color treated hair, so I need a little extra strength/moisture and shine without weighing down my hair any more than usual. I've tried all sorts of serums and glossing creams and stuff in the past with usually average results at best - either I'm not getting the shine results I want or I look like a wet dog, all weighed down with goop. Bought a bottle of this on a whim since I've been such a fan of the other Number 4 products I've sampled, and I'm SO glad I did. This is it.

After a couple of uses, hair is exceptionally shiny and looks healthier than usual. However, my hair is NOT weighed down at all. If anything, it's moving more than usual. And it feels super soft. I'm hoping continued use does improve the health of my hair, but even if not I'd keep using this stuff based on looks alone.

5
Was this review helpful to you? Yes | No 5 of 5 found this review helpful. Was this review helpful to you? Yes | No