Editor's TipEditor's Tip

Traveling can take a serious toll on hair. For major volume when you’re on the move, use the Number 4™ Volume Travel Sac.

Number 4 Hair Care

  • 4.5 out of 5 stars, based on 38 Reviews 38 Reviews Write a Review
  • $68.00
  • Number 4™ Hydrating Shampoo: 8.5 oz., Number 4™ Hydrating Condition: 8.5 oz.   
  • Availability: In stock

    $68.00

Birchbox Breakdown

It’s time to make it rain—on your hair, that is. With its ability to provide all-day moisture, this intensely hydrating shampoo and conditioner is basically a CamelBak for your strands. The satiny shampoo is gentle enough to use every day, while the decadent conditioner helps to bring dry, brittle hair back to life. Both products are loaded with natural moisturizers that calm frizz and restore fried ends while guarding against future damage (flat iron, we’re looking at you).

How to Use

The concentrated shampoo goes a long way. Depending on hair length and thickness, dispense one to two pumps of shampoo into hands and work into lather. Massage into wet strands and rinse thoroughly. Follow with one to two pumps of conditioner, working it through the mid-lengths and ends of hair. Rinse completely and style as usual.

Shampoo: 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

Conditioner: Water, Cyclopentasiloxane, Cetearyl Alcohol, Stearyl Alcohol, Cetrimonium Chloride, Behentrimonium Methosulfate, Fragrance, Glycereth-26, Dimethiconol, Divinyldimethicone/Dimethicone Copolymer, Gluconolactone, Cetrimonium Bromide, Panthenol, PPG-3 Benzyl Ether Myristate, Jojoba Esters, Quaternium-91, Amodimethicone, Hydroxyethylcellulose, Cetrimonium Methosulfate, Sodium Benzoate, C11-15 Pareth-7, PEG-45M, Laureth-9, Glycerin, Butyrospermum Parkii (Shea Butter), Aminomethyl Propanol, C12-13 Pareth-23, C12-13 Pareth-3, Cinnamidopropyltrimonium Chloride, Trideceth-12, Citric Acid, Cinnamyl Alcohol, Helianthus Annuus (Sunflower) Seed Oil, Ethylhexyl Methoxycinnamate, Sodium Ascorbyl Phosphate, Butylene Glycol, Helianthus Annuus (Sunflower) Seed Extract, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Tocopheryl Acetate, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Arctium Lappa Root Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Ilex Paraguariensis Leaf Extract

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Most Helpful Customer Reviews

Best hydrating shampoo and conditioner!!!
Purchased

I have tried countless moisturizing shampoo and conditioner sets over the years and this is hands down the winner. My hair has never felt so soft and has never been so free of tangles. It only takes a small amount so I'm sure the bottle will last months.

5
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Excellent Hydration
Purchased

The shampoo and conditioner both smell wonderful - natural, not super chemical-like or heavily fragranced. The shampoo really does hydrate without your hair feeling like it has build up or is weighed down. After using the set a few times consistently, I noticed that my hair felt stronger and stayed happier after blow drying and straightening it. The main issue I had is that it is pricier and I need to use a lot of it at a time (I have long, thick hair), however, I do love my hair and believe this product to be worth the money.

5
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Love this product
Purchased

This product and its conditioner counterpart make me feel like I went to the salon! Thanks for introducing me to this Birchbox! Love it!

5
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Great Shampoo!

I only bought the Shampoo, but will be purchasing the conditioner soon.

I never thought that fancy shampoos made a difference, but I was wrong!

I have so much less work to do after I shower when I use this Shampoo & Orbrie Gold Lust conditioner.

I would highly recommend to anyone!

5
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Great for fine dry hair

I really don't like shampoos that have a strong scent. THis is the first one that I actually love! It smells so fantastic and its great on my hair. Very gentle and doesn't dry out or leave a residue. Which is awesome because some moisturizing shampoos leave a build up rather quickly.

5
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Amazing set
Purchased

I bought this set after sampling the shampoo and falling in love. It is pricey because these are small bottles but if you only wash your hair every other day and use a little then I think the outcome is well worth it. This set cleans the hair, smells great, and conditions lightly without weighing the hair down. My hair feels so soft after using this set. My new favorite after using Redken and Pureology for years.

5
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My favorite Shampoo & Conditioner
Purchased

I really like these products. They smell great, apply great, and make my hair feeling great. I will continue buying Number 4, and will try other products from them. The only down side is that my wife says my hair gets flat when I use this, if my hair has gotten too long. If I had a styling product that I could use with this, but I don't feel at all, that would be great. I've tried many styling products and pomades that work, but it makes my hair feel stiff, completely defeating the silkiness that No 4 Hydrating makes it feel like. Any suggestions?

5
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Love
Purchased

This is a great combo for my thin long hair. Helps keep the ends healthy and does not leave my hair feeling too flat.

4
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So luxurious!
Purchased

I received samples of both the shampoo and conditioner, and I was smitten with not only the feeling of my hair after using them, but the smell also. My hair felt fabulous...so soft and shiny! And the scent was incredible...it smells very "earthy" and spicy. I'm not gonna lie though, the price about killed me, but in all honesty , even though the bottles seem small, the product lasts a long time! A little goes a long way...

5
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Renewed my hairs lustre
Purchased

Superb products. Love the scent. After mastering just how long to lather up the shampoo in my hands before applying to my hair , I find this a must have thing in my bathroom.

My hair is very long with the strands but LOTS of the. This softens my hair and gives it a lovely sheen. Definitely buying this again.

4
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