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 proteins and conditioners that hydrate and heal damage. 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!
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

1,409 Reviews
3.9 out of 5 stars
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459
4 Star
549
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283
2 Star
88
1 Star
30
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Most Helpful Customer Reviews

Worth the price
Purchased

I have naturally wavy and frizzy hair that I straighten at least twice a week. The first time I used this product I learned that less is more. I couldn't run my fingers through my hair so the second time around I used it sparingly and the results were amazing. My hair was soft and even looked like I went to a salon.

4
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What's up with that nozzle?
Purchased

Don't get me wrong, I LOVE this product. It provides great protection when curling/flat ironing my hair and it gives just the right amount of hold, but that spray nozzle! The other reviews are spot on when they say it comes out in a stream. I wish they would revamp this feature so that the spray was a mist, then this would definitely be a 5-star product!

4
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Jet stream spray
Purchased

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!

3
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great product- poor packaging
Purchased

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.

4
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heated hair

I use a lot of heat on my hair if not daily every other day, and using this product did not make my hair feel different or give it a different look. Probably wont be purchasing in future

3
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A bit sticky

Because I have course hair, I have to use high heat to style my hair, and that means I need to use a protectant. I like other products from this line, but this one seems to leave a sticky residue in my hair. I'm also not fond of the scent. It does seem to protect my hair and leave it shiny.

4
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MIL really liked

I have a love/hate with thermal sprays. I love what I know they're doing (i.e. protecting my hair), but I hate that I can't really see results. This one was nice and didn't weigh my hair down. I let my MIL use it and she really liked it too.

4
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Does it's job

I don't use heat styling often, but when I do I like a good thermal spray. This one's one of the best ones I've used. It left my hair feeling soft and smooth and not damaged. I highly recommend it for those who heat style be it all the time or occasionally.

5
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love this!

not only does this product make my hair sleek, but it also helps to hold the curl very well. I love number 4 products!

5
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Works Great

This kind of product is essential to my hair care routine; I could tell it nourished and protected my hair after blow drying. This is a must!!!

4
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