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💥 Turn up the volume, not the weight—fine hair, meet your glow-up!
OUAI Fine Hair Shampoo is a biotin-enriched, sulfate-free formula designed specifically for fine, thin hair. Infused with hydrolyzed keratin and chia seed oil, it strengthens strands, reduces breakage, and delivers lightweight volume and shine. Safe for color-treated and chemically processed hair, it features a signature Mercer Street scent and pairs perfectly with OUAI’s conditioner and thickening spray for a full volumizing routine.


























| ASIN | B084BW599K |
| Active Ingredients | Biotin, Chia Seed Oil, Hydrolyzed Keratin |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #1,359 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #36 in Hair Shampoo |
| Brand | OUAI |
| Brand Name | OUAI |
| Customer Reviews | 4.4 out of 5 stars 4,093 Reviews |
| Hair Type | Fine |
| Item Dimensions | 2.5 x 2.5 x 5.5 inches |
| Item Form | Liquid |
| Item Weight | 12.64 ounces |
| Liquid Volume | 10 fluid ounces |
| Manufacturer | Ouai |
| Manufacturer Part Number | 2532 |
| Material Type Free | Gluten Free, Paraben Free, Phthalate Free, SLS Free, Sodium Laureth Sulfate Free |
| Model Number | 2532 |
| Number of Items | 1 |
| Other Special Features of the Product | Not Tested On Animals |
| Product Benefits | Volumizing |
| Recommended Uses For Product | Split Hair |
| Scent | Mercer Street |
| Scent Name | Mercer Street |
| Suitable Hair Color | All Hair Colors |
| UPC | 815402021269 |
| Unit Count | 10 Fluid Ounces |
Y**.
LOVE LOVE LOVE
I don't typically write reviews however I'm in love with this shampoo! I have fine colored treated hair so it's hard to find a shampoo that doesn't weigh my hair down. Truest me when I say I've tried most all of them? I read the reviews and decided to try Ouai. I'm so impressed with the product. Not only does it smell amazing and lathers well it makes my hair soft and fuller. My boyfriend is your typical alpha male and I had the travel size in the shower on our last cruise. He literally came out and said that shampoo smells so good and lathers nice. I about fell out. He hardly notices anything!
M**A
My Hair Feels So Clean and Has More Body
I absolutely love this OUAI Fine Hair Shampoo. It leaves my hair feeling incredibly clean without stripping it, and it gives my fine hair noticeably more body and volume. A little goes a long way, and it lathers really well. My hair feels soft, looks healthier, and has more movement after every wash. It also smells amazing, which is a huge bonus. This has definitely become one of my favorite shampoos, and I’ll continue buying it.
L**K
Thickening thin fine hair.
It does what it says, it thickens the hair, leaves it soft and you do not need a while bunch.
C**L
Lightweight Shampoo good for my hair type
The shampoo has a lightweight quality that makes my thin hair feeling clean and buoyant. The bottle is easy to open. A bit pricey for the amount of shampoo, but worth the expense.
C**.
Great product for long, fine hair
I love this product for my long, fine hair. Unlike other shampoos, it neither dries my hair out, nor makes it limp or clumped together. I can room air/ soft brush dry without fuzzy ends.
T**A
Noticeable change in texture
I was reluctant to purchase given the price and disappointment with other similarly advertised products. This shampoo does make a difference- not huge but I do notice a difference in the texture of my thinning hair. It has a nice fragrance and lathers very well so only a small amount needed but I have short hair.
G**E
Use just a little bit
Smells great, and it takes less than a teaspoon for a good wash. I squirt a small dab in my palm, rub my hands together, then lather up. I saw visible results immediately with no other changes to my routine. I think there is a bit less frizz, too. Very pleased.
D**E
It really does make my hair look fuller!
I bought this shampoo as recommended by Wirecutter as the best for fine hair. It really does a good job of making my thin (and thinning) hair look fuller. I'm not in love with the smell however so I've taken to using my previous fragrance free shampoo for the second rinse. That seems to give me a happy medium of fuller hair without less smell.
B**M
Despite what others say....
I have been using Champo for a year and it made little or no difference to thickening my hair. Thought I would try a change and this came up. Look it's ridiculously expensive and I dont for a moment think it will restore hair once the follicle damage has occurred but I LOVE IT! I think it smells expensive and the packaging is chic. You really dont need very much as it lathers like mad - probably means it's full of sulphates - but to me it means that it will last a long time. I have short hair so not overly concerned with drying effect - this may be what makes hair feel fuller. My hair feels weightless and definitely has more body. I'm enjoying it!!
S**I
Super
No lo cambio, tengo un año usándolo y es lo mejor para cabellos finos grasos
A**R
Great shampoo
This is such a good shampoo. Your hair with thank you. They feel clean right away and it does what is supposed to for fine hair, it gives you volume. It might be pricey but worth it.
S**T
just okay
i didnt see what the fuss is about . it was good okay did the job but i couldnt understand the price.
G**D
Great daily shampoo
Leaves hair feeling clean and thicker
Trustpilot
3 days ago
2 months ago