Editor's TipEditor's Tip

After styling, set hair with Number 4 Non Aerosol Hair Spray for natural hold and shine.

Number 4 Hair Care

Birchbox Breakdown

While the hair of our dreams is glossy and sleek, our real hair leaves a lot to be desired. Whether your hair is fried and dull from too much heat styling or naturally frizzy, protect it with this nourishing spray. It’s packed with good-for-you ingredients that hydrate and heal damage.

How it Works

Jojoba protein nourishes and conditions hair while protective resins act as a lightweight barrier against the high heat of styling tools. An added bonus? It’s 100 percent vegan and free of gluten, sulfates, and parabens.

How to Use

Separate dry hair into small sections and spray each section evenly before using curling irons, flat irons, or hot rollers.

Water, VP/VA Copolymer, Isoceteth-20, Chlorphenesin, Fragrance, PEG/PPG-18/18 Dimethicone, PEG-12 Dimethicone, Silicone Quaternium-8, Polyquaternium-11, Disodium EDTA, Cinnamidopropyltrimonium Chloride, Limonene, Hydrolyzed Jojoba Protein, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Cocodimonium Hydroxypropyl Hydrolyzed Rice Protein, Hydrolyzed Soy Protein, Butylphenyl Methylpropional, Aminomethyl Propanol, Methylisothiazolinone, Linalool, Helianthus Annuus (Sunflower) Seed Oil, Alpha-Isomethyl Ionone, Citral, Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde, Glycerin, Coumarin, Evernia Furfuracea (Treemoss) Extract, 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

3.8 out of 5 stars, based on 100 reviews 100 Reviews
3.8 out of 5 stars
5 Star
32
4 Star
36
3 Star
18
2 Star
9
1 Star
5
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
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Most Helpful Customer Reviews

Jet stream spray

This product works okay- I have used it on wet and dry hair with good results both ways. (Curling iron waves stay pretty well and I THINK it helps protect my hair when blow drying.) However, especially when I use it on dry hair, I have to spray it on my hands first to distribute it, because the spray shoots straight out, instead of a finer mist. It makes it really hard to evenly distribute and I have even accidentally gotten an earful because of it. Yuck!

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Love it

I love all of number four brand products. They are phenomenal and I have even purchased some of them through birch box after receiving the sample!

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great product- poor packaging

I love this product- the way it makes my curly hair sleek and silky after I use a flat iron and blowdryer on it.
However, I find the container to be difficult to spray with one hand and impossible if your hands are wet or slippery after a shower. I have to use both hands to grasp it and press down the nozzle! the design aesthetic is nice- sleek cylinder black and white- but not functional.

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a necessity

this product smells absolutely amazing and works even better. i think it works better when my hair is still wet, but i've also used it on dry hair. it makes my locks feel like silk. definitely recommend.

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Sticky & smelly

I did not like this product. It smells bizarre, and left my hair feeling really sticky. I suppose it would work well for an up-do that you don't want to move at all. But I can't get past the smell to justify even using it for that.

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Really like!!

I rally love this product! I always use my flat iron and this helped the first try. I could instantly tell that it was protecting my hair. The only thing I would say that could be better is the spray. It's not so much a mist/spray as much as it is a straight shot out of the bottle. But it's still great and I love not having a greasy feeling to my hair after I use it!!

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LOVE this!

I have fine hair that's prone to frizz (and I live in a super humid part of the country) and this stuff was a miracle worker! I immediately had to buy it after my sample ran out. It holds my straight and wavy styles, which generally tend to devolve immediately after styling. :) And it definitely made my hair a lot shinier, even after just blow drying. This stuff is great!

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Styling spray

This product left my hair soft but limp. It has the same consistency as olive oil. My friends did state that my hair appeared healthier after I used this.

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Good stuff!

This stuff is great! I sprayed it on dry hair and it helped comb it out smooth and looked great all day.

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Great product

Use it on my hair when I'm using a flat iron to straighten my curly hair. Does a great job and my hair stays sleek and smooth.

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