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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Most Helpful Customer Reviews

Number 4 to the rescue
Sampled

I don't need a de-tangler, but this product smells great & keeps my hair feeling silky smooth after I blow dry and straighten!

5
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A good product
Sampled

I used this product on my daughter. She has long semi curly hair that gets tangled a lot and is also fine. It made brushing easy and less freezy.

4
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Love it!
Sampled

I used this spray-in conditioner daily after using regular shampoo and conditioner. Very light weight, smells good, and seemed to help control frizz. Got many, many uses out of the product sample so far. I blow dry my hair everyday (typically) and look forward to using this product again and again. Will be sorry when sample runs out! May have to buy full size product to use in summer when in the sun more.

4
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Great hair product
Sampled

When I first used it, I fell in love with its scent. I had never used a spray like this one before on my hair. It felt like a mist of rain. Not too heavy. Great product!

5
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surprisingly effective
Sampled

This product helped eliminate frizz, and smelled wonderful. Was my favorite item from my sample box this month!

5
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Number 4™ Super Comb Prep & Protect
Sampled

I like the way this made my hair feel, not sticky, but lots of hold. The smell wasn't too bad either.

5
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Smooth as Butter
Sampled

LOVE this product! My hair is thick and coarse, so it gets damaged easily with all the styling. This leave-in conditioner spritz has worked wonders in de-tangling, and making my hair super smooth and soft!

5
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Not for me
Sampled

I have very thin hair so it kind of made it feel a little dry? The smell was fine and I'm sure it works my hair is just already damaged!

3
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Great Protection
Sampled

Loved this product. I blow dry and straighten my hair everyday and this seemed to help with the heat damage.

5
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Hair
Sampled

Great product but not so much for people with fine/thin hair like myself

4
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