Editor's TipEditor's Tip

For the ultimate nourishment, treat your hair daily to Number 4™ Fluoro5 Elixer Restore & Repair Oil.

Number 4 Hair Care

Birchbox Breakdown

Whether your hair is over-processed and brittle, or just chronically dry, this is the shampoo for you. The satiny formula is gentle enough to use every day and helps to soften and hydrate strands with natural essential oils and extracts. Free of parabens and sulfates, it foams into a rich lather that leaves hair soft and shiny.

How it Works

Number 4™ uses vitamin B5 to condition hair and silicone to bump up the gloss factor, plus the brand’s patented Liquid Complexes™. Each of the four complexes is a different blend of natural ingredients, designed to help protect, purify, strengthen, and revitalize hair.

How to Use

The concentrated formula goes a long way. Apply one pump to wet strands and work into a lather. Rinse thoroughly, and follow with Hydrating Condition.

Water, Sodium Cocoyl Isethionate, Sodium Lauryl Sulfoacetate, Cocamidopropyl Hydroxysultaine, Disodium Laureth Sulfosuccinate, Sodium Lauroyl Sarcosinate, Cocamidopropylamine Oxide, Fragrance (Parfum), Divinyldimethicone/Dimethicone Copolymer, Glycereth-26, Glycol Distearate, Gluconolactone, Disodium Cocoyl Glutamate, Lauryl Alcohol, Decyl Glucoside, Quaternium-91, Panthenol, Guar Hydroxypropyltrimonium Chloride, Amodimethicone, PPG-3 Benzyl Ether Myristate, Sodium Benzoate, PEG-120 Methyl Glucose Dioleate, Sodium Cocoyl Glutamate, C11-15 Pareth-7, Trisodium Ethylenediamine Disuccinate, Laureth-9, Glycerin, C12-13 Pareth-23, C12-13 Pareth-3, Polyquaternium-7, Dihydroxypropyl PEG-5 Linoleammonium Chloride, Trideceth-12, Linalool, Helianthus Annuus (Sunflower) Seed Oil, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Sodium Ascorbyl Phosphate, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Grossularia Fruit Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Arctium Lappa Root Extract, Avena Sativa (Oat) Kernel Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Cymbopogon Schoenanthus Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Hydrastis Canadensis (Golden Seal) Root 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

176 Reviews
3.9 out of 5 stars
5 Star
69
4 Star
52
3 Star
37
2 Star
12
1 Star
6
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Most Helpful Customer Reviews

The smell!
Purchased

The hydration is really good - I need it living in Alaska. But, it was the smell that sold me. Sultry. And, my brother-in-law and my husband BOTH commented on how good my hair smelled within a day of each other when I used the sample. Ummm, wow. Been married 16 years - that never happens! This stuff is pricey, but I wait until I have a decent amount of points and then get the big bottle. I don't need much, which is also nice. Though, if you like the stuff that gets big and foamy - this is not the shampoo for you.

5
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Amazing!

I swear my hair has never looked so good. I don't have super dry hair but this shampoo worked wonders. I swear the 24 hours after I used the shampoo and conditioner my hair has never looked so good. This is an A+ product.

5
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Love the Shampoo, but not the price

I used this sample and loved it. I thought I'd add it to my favorites to buy at a later date, but unfortunately at $72 that is way beyond my price range for any shampoo. Great consistency, left my hair feeling nice and not too scented, but too bad it is so expensive.

3
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Disappointing

I recieved this shampoo in my december birch box and it smelled awful almost chemically and left my hair very dry! Do not recommend.

2
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enjoyed

This shampoo has great texture, cleans wonderful and doesn't take much to clean my very thick hair. I will not purchase due to price

4
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Fabulous!

This was just the thing for my colored, dry hair. It tamed the frizzies, made my hair soft and shiny, and added some volume. The smell is very pleasant, and while it is expensive, you don't use very much of it at a time so the bottle lasts for quite awhile.

5
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Favorite shampoo
Purchased

I have very thick curly/wavy hair that tends to be dry and dull from coloring. This shampoo really did make a big difference. My hair is shiny again and less frizzy. It doesn't take as much as other shampoos so it lasts much longer.

5
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awesome

very good shampoo. Very hydrating and made my hair feel soft and smooth. Also left my hair shiny! I recommend this product

5
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loooove it!

leaves my hair really nice eventhough i felt it a little rough afterward but other than that it works great and i would totally recommend it

5
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A Fabulous Shampoo!

I used up every last drop of this sample! It has a really great light scent (one of the best shampoo scents I've ever smelled actually!) and it is truly very hydrating for very dry and damaged hair. I loved it so much and really wanted to purchase this. However, this is the reason I unfortunately had to give it 4 stars instead of 5...the price! SO expensive. Very disappointing that it's so pricey but I thoroughly enjoyed the sample! Maybe someday I'll splurge on this!

4
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