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

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 it Works

Free of sulfates and parabens, this duo works in tandem to rebuild hair from the inside out. Vitamin B5 and jojoba help to nourish and hydrate dry strands, while Number 4™’s proprietary Liquid Complexes™ use potent natural ingredients like acai berry, vitamin C, and black currant to protect, purify, strengthen, and revitalize hair.

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

More for You!
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Men's Bonus Shop

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Most Helpful Customer Reviews

No. 4 Hydrating Shampoo & Conditioner Set
Purchased

I knew after recvg this as a sample in one of my Boxes last year that I was going to purchase this when my current shampoo & conditioner was about to run out. When it comes to hair and beauty products, I have tried a lot of them. I have dry, fine, wavy/curly, color treated hair.
I am very happy with the results of this combo. I don't like the way my hair feels after using the shampoo but the conditioner fixes that right up. I leave it on for 2-3 minutes and run my fingers gently through my hair as I rinse it out. I wrap my hair up in a towel to absorb most of the water and then follow up with the No. 4 Leave-in conditioner. Most of the time I air dry but when I'm time crunched I will blow dry. My results are; soft & manageable hair either way. Unless I find something that works better for my hair, this will always be a staple for me.

5
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Great set!
Purchased

I purchased this set because the individual bottles were out of stock at my time of purchase and I needed both of them anyway. I love both the shampoo and conditioner for my shoulder length, wavy hair so I say go for it! Try 'em both!

4
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Awesome
Purchased

This stuff is so hydrating and the smell is great. I wish the bottles were a little bigger - it is kind of pricey for what you get. You can get away with a small amount of shampoo if you "emulsify" between your hands first like the instructions say, but the conditioner will not last too long if you have long or thick hair. I definitely see a difference in my hair between this shampoo and other "hydrating" ones I have used.

4
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Too strong scent
Purchased

I like this product. It feels really nice on my hair; however, the scent is too strong for me. I had to return the product that I purchased. :-(

1
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Love this hydrating set
Purchased

Been wanting to purchase this since I sampled it. My hair is soft, shiny and looks great without any styling products or styling tools. I only need 1 pump to cover my thick, unruly, shoulder length hair so the price is worth it.

5
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I loved this product!

I received this product in November and I loved it! I straighten my hair nearly everyday and the heat has taken its toll- the ends are fairly damaged and dry (also somewhat frizzy). After one use I could really tell a difference! My hair was significantly less frizzy than normal and it was super shiny.

As far as the scent goes, I have noticed that several people describe it as smelling "old-lady" which I guess I can see, but I personally really liked it. It does have a strong fragrance that lasts for a really long time and I like that as well. I don't typically wear perfume and this was kinda my "lazy" way of smelling good.

5
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so shocked

Im not one to care much about hair products but this may become a new mist have. It made my hair feel so smooth and soft, more manageable. Just was definitely a great product. A little pricy but if you try it you will know why. Its worth the money.

5
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This is great!

Love this so much!! All day moisture, hair is never dry or brittle. And it does miracles on frizzy hair. BYE BYE frizz!!

5
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this smells like magic
Purchased

This shampoo and conditioner are awesome I will use this brand forever ( maybe I am kinda fickle) it smells amazing I imagine it to smell like magic would smell like if you' could smell magic . My hair is softer and more manageable than it has ever been. I must say I am in love.

5
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Hello Hydration
Purchased

After all the damage I've done to my hair this summer with wanting a balayage ombre look; i received a sample of this in my recent birchbox and i just had to purchase it! Both the shampoo and conditioner have made my hair softer, and it feels and looks healthier.

5
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