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A translucent OUAI Fine Hair Shampoo bottle containing pale yellow liquid stands upright on a warm cream surface. Text: “OUAI”, “FINE HAIR”, “CHEVEUX FINS”, “SHAMPOO”, “SHAMPOOING”, “10 fl oz / 300 ml”.
20% off
OUAI Fine Hair Shampoo bottle balanced on a sudsy, wet palm.
OUAI shampoo bottle with ingredient information on a white background
Ouai fine hair shampoo bottle styled with a pink rose, lemon slices, and jasmine flowers on a white background, with text reading 'MERCER STREET FRAGRANCE Notes of: ITALIAN LEMON, TURKISH ROSE, IRIS & WHITE MUSK'.
Before and after comparison of a woman with long blonde hair, wearing a white top.
OUAI Fine Hair Shampoo being dispensed from bottle into open palm.
Person washing long hair with shampoo lather in a shower, back view.
A translucent OUAI Fine Hair Shampoo bottle containing pale yellow liquid stands upright on a warm cream surface. Text: “OUAI”, “FINE HAIR”, “CHEVEUX FINS”, “SHAMPOO”, “SHAMPOOING”, “10 fl oz / 300 ml”.
20% off
OUAI Fine Hair Shampoo bottle balanced on a sudsy, wet palm.
OUAI shampoo bottle with ingredient information on a white background
Ouai fine hair shampoo bottle styled with a pink rose, lemon slices, and jasmine flowers on a white background, with text reading 'MERCER STREET FRAGRANCE Notes of: ITALIAN LEMON, TURKISH ROSE, IRIS & WHITE MUSK'.
Before and after comparison of a woman with long blonde hair, wearing a white top.
OUAI Fine Hair Shampoo being dispensed from bottle into open palm.
Person washing long hair with shampoo lather in a shower, back view.

Fine Hair Shampoo

For fine hair, this color-safe, thickening shampoo adds volume & bounce and smells as good as it looks.

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This color-safe shampoo breathes life into fine, flat hair with strengthening keratin, biotin, and nourishing chia seed oil. Hair is left clean, bouncy, and full of volume, so you can finally be fine with being fine. Follow with Fine Conditioner for best results.

IS THIS RECYCLABLE? Yes, I am fully recyclable!

How to use

Thoroughly wet hair from roots to ends.

Lather a quarter-size amount in your hands, then work into roots and anywhere hair touches the scalp.

Rinse shampoo. Make sure to squeeze out excess moisture before pairing with Fine Conditioner.

ingredients

Water / Aqua / Eau, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Peg-200 Hydrogenated Glyceryl Palmate, Cocamide Mipa, Fragrance / Parfum, , Panthenol, Cocoglucosides Hydroxypropyltrimonium Chloride, Hydrolyzed Keratin, Biotin, Salvia Hispanica Seed Oil, Cetrimonium Chloride (Anti-Static Agent/Agent Antistatique), Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Glycerin, Sodium Lauroyl Glycinate, Peg-150 Distearate, Propoxytetramethyl Piperidinyl Dimethicone, Trideceth-6, C11-15 Pareth-7, Peg-7 Glyceryl Cocoate, Sodium Chloride, Polyquaternium-7, Disodium Edta, Citric Acid, Sodium Hydroxide, Tetrasodium Edta, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol, Benzyl Alcohol, Acetic Acid, Sodium Acetate, Benzyl Salicylate, Limonene, Hexyl Cinnamal

As always, all of our products are:
Paraben-Free, Cruelty-Free, Gluten-Free, Phthalate-Free, SLS and SLES-Free

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Fine Hair Shampoo

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THE SCENT:
MERCER STREET

TOP NOTES

Italian lemon, orange, peony, iris, lily

MIDDLE NOTES

Magnolia, jasmine, rose damask

BASE NOTES

Musk, orris

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Overall rating: 4.592466 / 5 from 1168 reviews.

AI Generated Review Summary

Fine Hair Shampoo is praised for its ability to enhance hair fullness, strength, and shine. Customers appreciate its wonderful fragrance, effective scalp cleaning, and the healthy, shiny look it imparts. The shampoo's great volume and manageability, along with its amazing lather, contribute to a satisfying hair care experience.

Summary topics

  • Fragrance (4%): It was observed by customers that the fragrance of the product is wonderful and amazing, making it the most common opinion.
  • Hair Feel (42%): A substantial number of customers raved about how this shampoo made their hair feel amazing and healthier.
  • Scalp Cleanliness (3%): It was reported by customers that this shampoo effectively cleans the scalp and doesn't irritate the scalp.
  • Hair Appearance (4%): It was noted by customers that this shampoo and conditioner leaves their hair looking healthy and shiny.
  • Hair Volume (4%): Customers raved about the great volume and manageability of the Ouai thin hair shampoo.

Review topics: ["size","volume","fragrance","fit","weight","improvement","results","problem","quality","value","feels","smells","husband","packaging","texture","price","look","hair","bottle","works","scalp","body","formula","shipping","balance","amount","ingredients","difference","residue","compliments"].

Review highlights

  • "Nice shampoo lathers well had a nice smell and leaves my hair feeling very clean ."Missy S.
  • "MY scalp feels great and my hair feels clean!"Sarah H.
  • "My hair is soft, my scalp is not irritated and my hair smells fantastic."JAMIE H.

Reviews

Best shampoo

"Best shampoo I have ever tried for my fine and thin hair. However the bottle is horrible. But the shampoo is so good I don't care how bad the bottle is. I just transfer it into a better squeeze bottle."

Dixie (5/5)

Wonderful!

"I really love this product and I’m so grateful it has a refill! I have fine hair and many products weight it down or don’t wash out well but this shampoo is perfect! It leaves my hair feeling healthy, clean and light! I have no issues getting volume in my hair while styling!"

Katherine A. (5/5)

Best shampoo

"Besides smelling absolutely amazing, it preps my hair for any treatment, and my curls feel soft, clean, and super fresh."

Meredes P. (5/5)

Love it! Love it!

"I love this shampoo. I’ve tried many (too many) shampoos for “fine” hair. This is the only one that actually makes my hair feel thicker. I’m a customer for life! Also, I love the scent. The next day after washing I can still smell the Mercer St scent. I wish Mercer St was in more of your products. I hesitate to use, the conditioner, and the styling products because their smell will over write the Mercer St. But the shampoo for fine hair is truly wonderful!"

Born 🥴. (5/5)

Good Shampoo, Great Scent

"Pleeeaaseee bring back Mercer Street perfume. I need to sentmax this fragrance lol! Oh the shampoo? It and the conditioner are good mid range products. They’re not bad but it doesn’t blow my socks off. I find myself reaching for them tho, and I’ve finished their travel sized products (which is my rule if I am to purchase full size). I have fine wavy hair and it cleanses my hair really well and the conditioner doesn’t weigh it down. Are there drugstore shampoos that do the same? Sure. My shower experience is also important to me though, and this scent is heavenly. After 12hrs post shower and even sleeping on it, I can still smell the scent, and in this case, I love that. My hair feels soft and airy, thank you Ouai :)"

Rainie (4/5)

Love the shampoo & conditioner

"Ouai smells so good and leaves my hair looking great!"

Jennifer F. (5/5)

Great shampoo

"I have tried a lot of shampoo and conditioners for my fine hair and this has been the best product I have found."

Elizabeth S. (5/5)

Wish I had started this earlier

"As a woman in the middle of perimenopause my hair has changed. I have long, straight hair and hormone changes have left me with some hair loss and dryness. This stuff has transformed my hair within a few weeks. I have never had a shampoo and conditioner combo that I love, I find myself always looking for what is popular or what my salon uses. This will be my go to from now on!"

Kimberly S. (5/5)

"As someone with a lot of thin, straight hair, I’ve gotta say the Ouai fine hair shampoo has been the best shampoo to grace my scalp! I use this one most days, and every few days will switch it up and use the Ouai detox shampoo. Was excited to see they came out with a jumbo pump!"

Allison (5/5)

Great shampoo

"Ouai shampoo for fine hair is great. Leaves my hair feeling better than other shampoo I've tried."

Jilna K. (5/5)

Q&A

How to open bottle that does not have pump fine hair shampoo.
Hi Linda, Our standard-size Fine Hair Shampoo does not come with a pump. To open, look for the small indentation on the cap and press down on that area — the lid will pop open for easy use. ✨ I hope this helps! Please let us know if you have any further questions :).
If it sulfate free why is sulfate listed as an ingrident and sodium? Is it actually color safe?
Hi Maya, That's a great question-- All OUAI products are produced without the use of parabens, phthalates, and sulfates. The ingredient you are referring to Sodium C14-15 Olefin Sulfonate, is not a sulfate. Sodium C14-16 Olefin Sulfonate" (also known as Sodium C14-16 Alpha Olefin Sulfonate or AOS) is not the same as a sulfate; it's an olefin sulfonate, a different class of anionic surfactant with similar cleansing properties but a slightly different chemical structure. All of our products are SLS and SLES free. Which means OUAI uses alternative ingredients to help cleanse and nourish. Hope this helps!
Hello Ouai I LOVE YOUR PRODUCTS! especially the smell! But which of your four scents is the fine hair shampoo and conditioner?
Hi Kamille, Our Fine Hair Shampoo has the Mercer Street scent. It is is an outspoken fragrance that a-OUAI-kens the senses with notes of Italian lemon, Turkish rose, jasmine sambac, iris, lily, and white musk.
Is this product vegan?
Hi Maddie! Our Shampoos and Conditioners (including Fine Hair Shampoo) contain hydrolyzed keratin which comes from sheep's wool--no worries, no sheep was harmed during the process (they are basically being groomed)! OUAI Haircare products are produced without the use of parabens, phthalates and sulfates.
How often can I use a fine shampoo?
You can use our FINE HAIR Shampoo as often as often as you'd like! Some customers prefer it as their daily/regular shampoo. However, our Daily Care Shampoo's are tailored to be used as often as your hair needs!