Editor's TipEditor's Tip

For soft, healthy locks pair with Number 4’s Lumiere d'hiver Reconstructing Masque. The rich conditioner adds a serious dose of moisture to dry strands.

Number 4 Hair Care

Birchbox Breakdown

At the end of a long day we could all use a fresh start—the same goes for our hair. When product buildup and styling stress leave your locks feeling dull, use Number 4 Clarifying Shampoo, subtly scented with white freesia, golden amber, and warm musk, to gently cleanse without stripping moisture or color.

How it Works

Rich in vitamins and antioxidants, this clarifying shampoo restores health and shine to overworked tresses. Black currant and soy restore vibrancy; acai berry and vitamin C deliver youth-boosting antioxidants; Oolong tea and Irish moss defend against environmental damage; and lemongrass and oatmeal gently cleanse and purify. This shampoo is also vegan friendly and free from sulfate/sodium chloride and parabens.

How to Use

Squeeze a small amount (a little goes a long way) of the water-activated formula into the palm of your hand and work into a thick lather. Deposit the lather evenly through damp strands and rinse thoroughly. Use daily for best results.

Liquid VibranceTM Complex (Black Currant, Soy Yogurt, Algae, Yerba Mate), Liquid VitalityTM Complex (Acai Berry, Hibiscus, Mangosteen, Vitamin C), Liquid DefenseTM Complex (Burdock Root, Oolong Tea, Irish Moss, Vegetable Protein), Liquid PurityTM Complex (Lemongrass, Gooseberry, Organic Oatmeal, Golden Seal)

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

2,785 Reviews
4.1 out of 5 stars
5 Star
1451
4 Star
1054
3 Star
498
2 Star
157
1 Star
120
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Most Helpful Customer Reviews

Number 4 is a 5!!
Purchased

This is the best clarifying shampoo I have ever tried. I love the fragrance and how clean it leaves your hair. You do not need to apply a lot. A little goes a long way. I truly believe the high price is accurate for all this product does. With each wash, you get a hair fresh start!

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felt light and healthy
Sampled

this shampoo felt light, fresh, and clean on my hair. i have enough of the sample to use it a few times.

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Okay
Sampled

This shampoo left my hair feeling wonderful, and I enjoyed the scent. I am not one to spend quite so much money on shampoo, so the sample was enough for me.

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Not good for thick hair
Sampled

I had to use the whole sample bottle to wash my hair. I have very thick hair so I don't think I would purchase.

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A nice shampoo
Sampled

I liked this shampoo, it left my hair feeling squeaky clean, but not dried out.

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does a great job
Sampled

love this shampoo it smells good, feels good on my hair and after my hair didnt feel greasy or dry. i personally dont like spending that much on shampoo. but as a sample i really liked it.

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Not a fan

I don't like the scent of this product - it reminds me of a hotel shampoo/conditioner. Also found the packaging to be quite bland.

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ok
Sampled

This shampoo is thick but cleanses well. It also smells nice. too expensive though.

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Surprising product
Sampled

I really expected this product to dry and strip my hair when I used it like most clarifiers do, however I was completely shocked. My hair was so soft and smooth after using this product, I contemplated whether or not to use conditioner! I never realized how much buildup my products may have left on my hair even though I use quality products, but it was definitely the. Great product!

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Loved! Used with masque and cannot stop
Sampled

This product is great. Smells delicious, felt incredibly smooth and loved the aftermath!

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