Editor's TipEditor's Tip

For ultra-healthy locks, apply Super Comb Prep & Protect after deep conditioning with Number 4 Lumiere d'hiver Reconstructing Masque.

Number 4 Hair Care

Birchbox Breakdown

As self-confessed blow dryer addicts, we put our hair through a lot of stress. To keep our strands from a styling-induced meltdown, we’ve been using this extra hydrating leave-in conditioning mist. It doesn’t just protect hair from heat damage; it also doubles as a color protector and UV shield. The sulfate-free formula sinks in quickly and has a pretty floral scent thanks to white freesia, amber, and musk.

How it Works

Natural conditioners—including black currant, soy yogurt, algae, and yerba mate—combine to restore hydration to dry hair, while the unique UV/Color Polar Shield protects dyed or sun-exposed locks. Soy and vegetable proteins repair damage caused by heat and chemical styling. And don’t forget about the defrizzing factor—anti-static technology tames flyaways, making hair more manageable and easy to style.

How to Use

After shampooing, wring excess moisture from hair and towel dry. Holding the spray bottle upright, spritz product evenly. Using a wide-toothed comb or your fingers, gently work the product through hair from root to tip. Style as usual.

eau/water, amodimethicone, peg-40 hydrogenated castor oil, cetrimonium chloride, glucose, panthenol, parfum/fragrance, cetrimonium carboxydecyl peg-8 dimethicone, sodium pca, citric acid, cinnamidopropyltrimonium chloride, trideceth-12, magnesium sulfate, hydroxyethylcellulose, trisodium ethylenediamine disuccinate, hydrolyzed soy protein, hydrolyzed vegetable protein pg-propyl silanetriol, glycerin, sodium ascorbyl phosphate, lactoperoxidase, glucose oxidase, macrocystis pyrifera extract, ribes grossularia fruit extract, ribes nigrum (black currant) leaf extract, chondrus crispus (carrageenan) extract, euterpe oleracea fruit extract, garcinia mangostana peel extract, helianthus annuus (sunflower) seed oil*, arctium lappa root extract*, avena sativa (oat) kernel extract*, camellia sinensis leaf extract, cymbopogon schoenanthus extract, hibiscus sabdariffa flower extract*, hydrastis canadensis (golden seal) root extract*, ilex paraguariensis leaf extract*
*certified organic by QCS

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Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

Great for Fine Hair
Sampled

I love conditioner, but because I have fine hair, I find it sometimes doesn't love me. This product has done much to mend my off-again-on-again relationship with this fickle hair care product. Since it's applied after towel drying one's hair, it's much easier to achieve a desired level of supple goodness. The description on the bottle would lead me to believe it was created with thicker, fuller, more perfect hair in mind (it suggests applying after conditioner!), but if you skip the conditioner and stick to the spray, your fine hair will find itself well-cared for.

5
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Makes hair soft with a nice scent
Sampled

I liked this spray a lot, especially the light and pretty smell. It made my hair very soft when I used it. However, I already use "Perfect 10", and I prefer it to this product because it controls my frizzy hair more.

4
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Great hair treatment
Sampled

I really like this.easy to use and made my hair soft

4
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Not Impressed
Sampled

For some reason, this brand never seems to impress me when I use it on my hair. I know it works great for others, it just doesn't for me.

2
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Mostly Good Product
Sampled

I have used Number 4 products in the past including shampoo and conditioning product. The quality of Number 4 products is good. However, I did not like the scent of this product and will not purchase it for that reason.

4
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Love
Sampled

This spray keeps my hair protected and smells great. Very light-weight and helps with fly aways. Usually use 'It's a 10' but really think i'll be switching.

5
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Protects
Sampled

Gave me some protection against the heat from the straightener and helped soften my ends.

4
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Works good, love that it's vegan
Sampled

Great product and works well on my hair. Has a weird smell but love that it's a vegan product.

4
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Great Product
Sampled

This spray is great! I've used it everyday since I got the sample. It makes my hair feel soft and is a heat protector. The only problem is I'm not the biggest fan of the smell. It's not awful but just not for me. Other than that I love it!

4
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Nice Product
Sampled

I love this detangler! It smells great and leaves my hair soft and shiny. I actually waited and used it after my hair was already dry and it still worked great! My hair was instantly defrizzed and soft. It is also sulfate free which helps!

5
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