Hydrating Shampoo 8.5oz
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Weightless Moisturizing, Color Protecting, Anti-Aging.

For Normal to Dry Hair


Weightless moisturizing, Color Protecting, Anti-Aging.
For normal to Dry hair – Won’t weigh hair down.
Foaming lather – Sulfate & Sodium Chloride Free, Gluten Free and Paraben Free.
Highly concentrated formula. Desire more lather – add more water not more product.
Emulsify in hands and massage into wet hair. Lather. Rinse. Follow with L’eau de Mare Hydrating Condition.

For best results shake bottle well before using.

+Fact Sheet

+Safety Data Sheets


SKU: 03004

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Breakage-Prone Hair

Avoid These Bad Styling Habits If You Have Breakage-Prone Hair

Avoid These Bad Styling Habits If You Have Breakage-Prone Hair 546 450 Number 4 High Performance Hair Care

Avoid These Bad Styling Habits If You Have Breakage-Prone HairBONJOUR DAH-LING!

Stop and listen up! If you have breakage-prone hair these are the things you need to stop doing straight away to guarantee visible results!

There are several reasons why your hair might suddenly become prone to breakage. It’s not only excessive coloring and dehydration that have their part to play.

Stress may be a factor, poor nutrition and good old family genetics. Scary snapping strands should however serve a sure fire sign that it’s time to switch things up, in the styling and heat setting stakes.

How To Improve Hair Health

Before we dive in with the list of DON’TS, let’s consider first a few DO’s!

A weekly deep-conditioning treatment can be a real hair-savior. Try out something like N4’s Reconstructing Hair Masque to deliver that pret-a-porter glow. Featuring a blend of soy proteins alongside Vitamin B5, it’s packed with deeply replenishing and smoothing natural conditioners.

Another top sleep tip is to switch to a silk pillowcase too. You’ll not only sleep like a Princess, but you’ll wake up looking more like one too!

Breakage-Prone Hair No No’s!

OK, on to the “mane” event! What not to do! Here are our top tips on the bad habits you need to banish to protect bad hair behavior.

Hot Water

We all love a steaming hot shower but that scorching hot water wreaks havoc on weak strands. If you have fragile and breakage-prone hair, you need to treat it like a baby. Softly, softly is the way. Avoid super hot water that will open up an already fragile cuticle and strip it of essential oils. Instead, switch to cool water that will seal the cuticle and help prevent damage. As a further bonus, you’ll also be amazed how much shinier hair looks when you make this subtle showering change.

Heat Setting

This is an easy hack to implement and one that you probably know already but don’t always remember to action, especially when you are in a hurry and just want your hair dried in record time. It may take a little longer to dry your hair, but we highly recommend you use the warm or even the cool setting, never the hot one. Also be sure to keep the hairdryer nozzle at a decent distance away from your head.

Brush Up On Your Technique

Word! You’ve probably been brushing your hair wrong your entire life. You shouldn’t be brushing your hair from root to tip. Instead, brush from the ends and work your way up. Sounds simple but it really is effective.

Easy On The Hair Ties

Avoid super tight ponytails held in place by abrasive ties that can tug on the hair and cause unnecessary breakage. Maybe take a look at silk scrunchies. Just like your recommendation for your pillowcase, a silk hair tie is a great option and they’re pretty darn cute too.

Go Alcohol Free

We don’t mean don’t drink and dry! Sometimes a Friday night dress up session needs a Cosmopolitan on the side. What we do mean is steer well clear of any products that contain harsh ingredients, but in particular alcohol that will cause the hair to go dry and a little bit crispy. All N4 products are packed with natural ingredients and are 100% free of nasties so you’ve nothing to worry about on that score.

Don’t Sleep On It

A lot of us are probably guilty of this one but you should never sleep with your hair up. Always keep it loose if you want to snooze! Or tie it in a simple braid. And a reminder again…invest in that silk pillowcase for the hair and sleep of your dreams

We Care




Sulfate & Sodium Free









Benefits of All Number 4 Products

Flex-net Resins

To provide flexible
style with shine

Humidity Resistant Technology

Reduces friz & flyaways


Shields hair from heat


Easy to cocktail together
or layer in hair


To prevent drying hair


Provides extra conditioning


For all hair types
Use on wet or dry hair

Room for

Find what works for you

Number 4
Liquid Complex Culture

Number 4 Liquid Complex Culture is the backbone of our brand, defining all of our products and drawing upon water and an advanced delivery system that takes beneficial botanical agents and technology to achieve consistent high performance hair care results.


Liquid VibranceTM

Nutritive to hair and scalp, moisturizes and enhances shine. Contains a blend of vitamins and minerals to restore natural vibrancy. Color protecting. Contains Black Currant, Soy Yogurt, Algae, Yerba Mate


Liquid VitalityTM

Contains potent anti-aging properties which promote and enhance youthful vitality. Rich in antioxidants. Contains Acai Berry, Hibiscus, Mangosteen, Vitamin C


Liquid DefenseTM

Hydrates and strengthens. Repairs damage, revitalizes and restores. Helps protect from the adverse effects of heat styling, chemical processing and environmental factors. Contains Burdock Root, Oolong Tea, Irish Moss, Vegetable Protein


Liquid PurityTM

Sulfate & Sodium Chloride free formulas prevent build-up while protecting color and natural sheen. Contains Lemongrass, Gooseberry, Organic Oatmeal, Golden Seal

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Customer Reviews

Based on 20 reviews
I’m a return customer and for good reason

I found No 4 through Birchbox yearsssssssss ago haha. And I searched high and low from several retailers before realizing I can purchase through that website, duh! NOTHING leaves my hair both perfectly clean and deeply thick & shiny like No4. And you can’t beat that scent. So soft and sweet. Love it!

Tatianna Berry


Nicki F
Hydrating Shampoo

Love the shampoo, my hair is dry. This shampoo has made my hair so soft and more manageable. They also gave me some samples of there condition hair mask. It is wonderful. Also, it smells so good!!

Kat Webb

Love this shampoo and this is very reasonable price compared to other sites. Highly recommend

Amanda F.
The Best Shampoo!

I’ve tried so many different shampoos through the years, & I always return to this one at some point because it simply works so well. I live in an area that has very hard water, and this helps make sure both my hair and scalp are in good condition even when the water isn’t great. I find this still lathers & cleans extremely well even with hard water.

I’m also 17 months postpartum from having my most recent child and this shampoo is helping maintain the strength of my hair as it continues to regrow after that notorious postpartum hair loss most women go through after a baby. I strayed away from the shampoo for awhile, and my scalp really noticed, as I had extreme dry patches. This shampoo is worth every penny.. and the smell is beautiful but not overpowering. Can’t recommend enough!

13 reviews for Hydrating Shampoo 8.5oz

  1. Michelle

    This is my holy grail shampoo! The scent is heavenly, and it leaves my hair hydrated but not limp or oily. I believe this product helps keep my highlighted and heat-styled hair looking its absolute best.

  2. baxterdiane689

    I purchased this shampoo thru my salon where I have my hair colored. Initially, upon the first use, my hair felt tangled and stiff. Once I applied the conditioner, it helped, but no shampoo should make your hair feel tangled and rough. The conditioner is great, but the shampoo was not good for my fine color treated hair at all. What a disappointment.

  3. josephine.schagerstrom

    This shampoo is perfect for my colored curly and frizzy hair. Leaves no residue and makes my hair fresh and clean and brings out the true beauty of my hair. I will never stop buying it.

  4. davnbird (verified owner)

    I have been a loyal fan of Number 4 Hydrating Shampoo for years; however, the last bottle I received was totally different from the previous bottle. The product was brown, did not lather at all, and left my hair lank after washing. I will not be buying any more of this brand.

  5. Dora J Crow

    The texture, scent & cleansing w/out stripping my purple color off is sensational. I thought I’d never find a pro product (I am licensed managing cosmetologist) that would meet or exceed all my requirements. It’s luxurious feel & color of the shampoo to begin with is a zen-like experience. Once you get that nectar on your hair & start to shampoo? Heavenly scent of patchouli fills your shower. It leaves hair hydrated & moist. It actually does what it professes to do, unlike so many other products. I adore Number 4! Psst- your man will always want to smell you, wondering what that new scent is that you are wearing!

  6. Lauren

    I got a sample of this in my Birchbox and it is absolutely the most amazing shampoo I’ve ever used! My hair is normally dry and damaged from the blow dryer and curling iron and this shampoo completely transformed it! It’s so soft and I hardly get split ends now. Definitely going to keep buying it 🙂

  7. fawxed

    This shampoo is an absolute DREAM! Super concentrated, a little bit really does go a long way, but it really gets the job done. My tresses are silky and my frizz is greatly minimized. It also smells delightful. Do yourself a favor!

  8. sillyj435

    Love love love this. My hair was so soft and feels so healthy!!! Oh and it smells sooo yummy. I have curly hair and fight with hydration issues. With this I no longer fight. Thanks.

  9. cjtang4u

    I love this line! All of the lines smell great but the Hydrate one is my favorite. This one smells like honeysuckle and I get whiffs of it throughout the day when I use it. A little goes a long way!

  10. molson

    This shampoo has saved my life. Well, technically it saved my hair, but since my hair is a huge part of my life… you get the gist. I have naturally curly hair that easily falls flat and goes frizzy. I have received so many compliments since my hairdresser introduced me to No. 4. and all I have to do is wash and go–no fuss and my hair looks amazing and feels amazingly soft.
    Mega hydrated! I love this stuff and you will, too!!

  11. a1nettie

    I love the way this makes my hair feel. The scent is unique and initially strong and off putting, but when I felt how my hair felt I was sold!Super silky and I don’t feel like I “Need” a conditioner when using this. Excellent!

  12. julesc

    Perfect! I got a sample of both the hydrating shampoo and conditioner in my June Birchbox. Being a cosmetology student who’s currently trying like crazy to grow my hair out, I’m pretty picky about what I’ll put on my head. I decided to give this shampoo a shot and I’m hooked! Seriously, my usually frizzy hair has never felt so clean and soft, it’s even tamed my wiry, damaged ends from bleaching!

  13. emboog

    OMG. You must try this product! No disappointment will be had! Well worth the cost. Promise. Must follow-up with conditioner.

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