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Shampoos

Meet the shampoos that started it all. Fine, medium, thick, or in serious need of a reset — the formula's built around your hair, not a guess at it. No sulfates, no parabens, no phthalates, no gluten, just a wash that does its job and smells like heaven too. Find yours, then say yes OUAI to a better hair day.

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An amber OUAI shampoo bottle stands upright on a warm cream surface beneath a translucent cap. Text: “OUAI”, “DETOX SHAMPOO”, “SHAMPOOING DÉTOX”, “ALL HAIR TYPES”, “TOUS LES CHEVEUX”, “10 fl oz / 300 ml”.
Allure Best of Beauty Award 2026 logo on a red background
 
OUAI Detox Shampoo bottle being splashed with water, creating foam and bubbles.
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Two OUAI Fine Hair shampoo and conditioner bottles stand side by side on a cream studio surface, comprising a translucent yellow shampoo bottle and opaque ivory conditioner bottle.
 
OUAI Fine Hair Shampoo and Conditioner held up against white background.
+15% off Exclusive
Two standard-size OUAI Medium Hair shampoo and conditioner bottles stand side by side, featuring translucent amber shampoo and opaque cream conditioner packaging.
 
OUAI shampoo and conditioner bottles with water splashes on a gray background
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OUAI Thick Hair Shampoo and Conditioner 300ml bottles displayed together on neutral background.
 
OUAI Thick Hair Shampoo and Conditioner bottles splashed with water droplets.
+15% off Exclusive
A jumbo translucent OUAI Fine Hair Shampoo pump bottle containing pale yellow liquid stands against a warm cream background. Text: “OUAI”, “FINE HAIR”, “CHEVEUX FINS”, “SHAMPOO”, “SHAMPOOING”, “16 fl oz / 474 ml”.
 
OUAI Fine Hair Shampoo 16oz bottle surrounded by soap bubbles and foam.
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OUAI Medium Hair Shampoo 16 fl oz pump bottle on neutral background
 
OUAI Medium Hair Shampoo bottle surrounded by bubbles on a glass shelf.
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OUAI Thick Hair Shampoo 16 fl oz pump bottle on neutral background
 
OUAI Thick Hair Shampoo 16oz bottle covered in lather on glass shelf
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Two jumbo OUAI Fine Hair shampoo and conditioner pump bottles stand side by side, with pale yellow translucent shampoo and opaque ivory conditioner packaging.
 
OUAI Fine Hair Shampoo and Conditioner bottles splashed with water on glass shelf.
+15% off
Two jumbo OUAI Medium Hair shampoo and conditioner pump bottles stand side by side, with amber-toned shampoo and cream conditioner packaging against a neutral studio background.
 
OUAI Medium Hair shampoo and conditioner bottles splashed with water droplets
+15% off
OUAI Thick Hair Shampoo and Conditioner 16 fl oz pump bottles displayed together.
 
OUAI Thick Hair Shampoo and Conditioner bottles drenched in water splashing dramatically.
+15% off

Meet the shampoos that started it all. Fine, medium, thick, or in serious need of a reset — the formula's built around your hair, not a guess at it. No sulfates, no parabens, no phthalates, no gluten, just a wash that does its job and smells like heaven too. Find yours, then say yes OUAI to a better hair day.

Shampoo FAQs

Which shampoo is right for my hair type?

Fine, Medium, or Thick. That's the whole decision tree, and it's based on strand thickness, not how much hair you have. Fine Hair Shampoo builds body without weighing anything down, Medium balances and adds shine, Thick brings serious moisture for denser strands. Need a reset first? Detox Shampoo, then pick your lane. Still stuck? Our quiz sorts it out in about ninety seconds.

Are OUAI shampoos safe for color-treated or chemically processed hair?

Yes. Nothing in here strips color the way sulfates do, so your shade holds on longer than it would with a stripping formula. We'd still say check with your stylist for anything treatment-specific, but the shampoo itself isn't the risk.

How often should I use detox shampoo?

Once a week, in place of your usual shampoo, not alongside it. It's concentrated, so daily use would just dry things out. Living somewhere with hard water or heavy on the products? Twice a week is fair game. Follow up with conditioner either way.

Are OUAI shampoos sulfate-free?

Every one of them. No SLS, no SLES, no parabens, no phthalates. We'd rather clean your hair than strip it bare. Cruelty-free too, for what that's worth (a lot, really).

Can I use shampoo every day?

Fine, Medium, and Thick are all gentle enough for daily use, and a lot of people do exactly that. Detox is the one exception; save it for once or twice a week, since it's built to go deeper. If your scalp starts feeling dry, that's your cue to pull back a little.

What ingredients are used in OUAI shampoos?

Depends on the formula, but the through-line is ingredients that earn their spot: keratin for strength, marshmallow root or shea butter for moisture. Detox leans on apple cider vinegar to clarify without wrecking your scalp's balance. What you won't find: sulfates, parabens, phthalates. Full lists live on each product page if you want the specifics.

Should I use OUAI shampoo with an OUAI conditioner?

It's the pairing we'd recommend. Fine with Fine, Medium with Medium, Thick with Thick, since the two are formulated to work as a system. Nobody's stopping you from mixing based on how your hair's feeling that week, though. If you'd rather not decide twice, the Shampoo & Conditioner Sets already made the call for you.