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 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

Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

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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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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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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Great product
Purchased

Love love love the shampoo! The conditioner is a bit heavy which is why its getting 4 stars. No 4 shampoo is the best.

4
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Love This!

The first thing I noticed is the wonderful smell of this product. It is rich and thick and creamy. My hair was much more easily dried and styled and hydrated. I love this product!

5
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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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