Number 4™ Thermal Styling Spray

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.

Number 4™ Thermal Styling Spray
3.9 out of 5 stars, based on 2,204 Reviews 2,204 Reviews
3.9 out of 5 stars
5 Star
701
4 Star
836
3 Star
463
2 Star
145
1 Star
59
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sampled
Hair type
Thick
Fine
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Wavy
Curly
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Normal
Oily
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Age
17 & under
18-24
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35-44
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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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Great for Frizzy Hair
Sampled

I rarely blow dry my hair, and the few times I have I've used this product. I avoid blow drying because it frizzes out so badly. This really worked well, though, at maintaining my course hair. Will be purchasing.

5
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Great Styling Product
SampledPurchased

This product is great for curly hair and to beat the humidity! I also love the way it smells. I would give it more stars but I feel like it could hold my hair a bit better. It makes my hair less frizzy but also I feel like it doesn't really hold the curl. Just leaves my hair wavy. The smell outbeats it all!

3
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Number 4
Purchased

Not what I expected. Very very heavy spray. Smells good enough, I was hoping for something a bit more like a dry oil. I'very used this several times trying to love it....hasn't happened yet

1
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Love it
Sampled

I love all of Number 4's products I have received so far. This works great, has a great smell and love the fact that it is also 100 percent vegan!

4
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Works
Sampled

Smells great and works. I am always skeptical of products claiming to tame frizz. It takes a lot to tame my frizzy hair. But this works well. Made my hair softer and smells great. I feel like it took less time to dry my hair, too.

5
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effective but oily
Sampled

this spray was effective at making my hair glossy and sleek but be warned that it's rather slick and will leave your hair feeling oily. i prefer the beauty protector brand,which is also sold from birchbox.

that being said, if you're going for a very sleek or even wet look, this might be the product for you. if you're just looking for manageability, you might want to look elsewhere.

3
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firm hold
Sampled

this product made my hair feel like fake doll hair, firm and lifless i was very disappointed with how it felt for the rest of the day

1
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