Editor's TipEditor's Tip

To tame stray flyaways, mist Number 4’s Non-Aerosol Hair Spray onto dry hair.

Number 4 Hair Care

Birchbox Breakdown

Aside from the lucky few born with wash-and-wear locks, most of us need a little help to make our hair presentable. Whether your hair is curly, straight, or somewhere in between, this light styling lotion is packed with good-for-you ingredients that leave your strands nourished, conditioned, and easy to style. The super-sleek packaging doesn’t hurt, either.

How it Works

Soy protein nourishes and protects while vitamin B5 enhances hair’s condition and appearance. Flexible resins allow for easy styling and restyling throughout the day. Natural burdock root strengthens hair and nourishes the scalp. Number 4 products are vegan and free of gluten, sulfates, and parabens.

How to Use

Apply a few pumps to damp hair and blow dry, flat iron, or air dry as usual.

Water, Polyacrylate-2 Crosspolymer, PEG-40 Hydrogenated Castor Oil, Potassium Hydroxide, Ethylhexylglycerin, Chlorphenesin, Fragrance, Disodium EDTA, Limonene, Butylphenyl Methylpropional, Linalool, Alpha-Isomethyl Ionone, Citral, Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde, Coumarin, Evernia Furfuracea (Treemoss) Extract, Helianthus Annuus (Sunflower) Seed Oil, Glycerin, Sodium Ascorbyl Phosphate, Hydrolyzed Soy Protein, 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

75 Reviews
3.2 out of 5 stars
5 Star
15
4 Star
22
3 Star
15
2 Star
8
1 Star
15
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

Tamed my frizzy hair

Although it makes my hair a little hard I have grown to love this. The sample size has lasted a long time and whenever I use it, it is a good hair day. My hair is no longer frizzy and my curls are defined but don't look gel-ed. Looking to buy the full size soon.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
A great all around product
Purchased

I am a little hesitant to try to hair products, simply because I have oily hair, so I never know how it will turn out. I actually waited a little while before trying this product (like, several months). But one day, I tried it and loved it! It feels great, smells great, and protects my hair. It works well in combination with any other products you might regularly use.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
A little sticky, not for curls

This product controlled curly my hair decently, and smelled pleasant. But it left my hair a little sticky which led to knotting. Would probably work better if I was blow drying my hair straight.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
perfect for all occasions!
Purchased

this product works great on my thick/curly hair! i've struggled for many years to find a good product that will let my hair keep in moisture, keep away frizz, and look shiny while still allowing me to style my hair in a natural form. with the number 4 solution, i can use a small dollop right after washing my hair to make sure it stays in top form - the best part is that it works as a great base for the other leave-ins/styling products that i usually use with no weird cross-reactions!

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Liked It!!

I was happy with this product! It didn't weigh down or make my hair look greasy. helped taiming fly aways as was great for those up and go mornings!

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
quick easy product with consisten results

i used this product while travelling though the uk. it's quick to scrunch into wet hair and kept my hair from frizzing. it's also very lightly scented, which is nice. my only complaint would be that if i accidentally used too much (which is easy to do in this packaging) it would leave my hair a little on the crunchy/greasy side. never used it on dry hair.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Shocked on reviews

Shocked, absolutely shocked that this didn't get 5 stars. This stufffff is my favorite hair product. My hair usually doesn't respond to products or benefit from them for the most part- but this stuff smells amazing, goes on sticky but when I wake up in the morning all I have to do is take a brush through it and it's good to go.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Bleached my sheets

This product is OK. It does condition my hair with a great smell, but if I put it on when my hair is still damp and I go to bed it bleaches my sheets. My light gray sheets turned pink where I laid my head down. Now I've learned my lesson and only use in the am.

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Made hair worse...

Unfortunately, this product was too thick and heavy. It made my hair feel sticky and oily. I had to give it away!

Was this review helpful to you? Yes | No   Was this review helpful to you? Yes | No
Changed my mind, I don't like it.

Initially when I received this sample and used it the first time, it seemed like a decent styling primer. However, after using it again, it just seemed to weigh down my hair and leave it a quite sticky; and I didn't even apply that much product. It seemed to harden almost immediately, as if i had sprayed an entire bottle of hair spray...Maybe this product will work best for those who have short hair, like a pixie cut.

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