---
product_id: 184499277
title: "Fine Hair Shampoo Refill - Thickening Shampoo for Thin Hair (32 oz) | Volumizing & Strengthening with Biotin, Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free"
brand: "ouai"
price: "€ 158.01"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ouai"
url: https://www.desertcart.hr/products/184499277-fine-hair-shampoo-refill-thickening-shampoo-for-thin-hair-32
store_origin: HR
region: Croatia
---

# Hydrolyzed keratin strengthens Biotin & chia seed oil boost 946 ml volumizing refill Fine Hair Shampoo Refill - Thickening Shampoo for Thin Hair (32 oz) | Volumizing & Strengthening with Biotin, Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free

**Brand:** ouai
**Price:** € 158.01
**Availability:** ✅ In Stock

## Summary

> ✨ Elevate your fine hair game with OUAI’s luxe volume boost! ✨

## Quick Answers

- **What is this?** Fine Hair Shampoo Refill - Thickening Shampoo for Thin Hair (32 oz) | Volumizing & Strengthening with Biotin, Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free by ouai
- **How much does it cost?** € 158.01 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/184499277-fine-hair-shampoo-refill-thickening-shampoo-for-thin-hair-32)

## Best For

- ouai enthusiasts

## Why This Product

- Trusted ouai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Color-Safe Confidence:** Perfect for color-treated, keratin-treated & chemically processed hair
- • **Complete Volume Ritual:** Pair with OUAI Fine Conditioner & Thickening Spray for next-level lift
- • **Bounce That Lasts All Day:** Delivers major volume without stripping fine hair
- • **Clean Beauty, Zero Compromise:** Sulfate, paraben, phthalate & gluten free for safe, gentle care
- • **Power Trio for Stronger Strands:** Biotin, keratin & chia seed oil reduce breakage & add shine

## Overview

OUAI Fine Hair Shampoo Refill is a 32 oz volumizing shampoo formulated with biotin, hydrolyzed keratin, and chia seed oil to strengthen and thicken fine hair. This sulfate- and paraben-free formula gently cleanses without stripping, is safe for color-treated and chemically processed hair, and features a signature Mercer Street scent. Designed for lasting volume and reduced breakage, it’s the go-to refill for professionals seeking fuller, healthier hair.

## Description

desertcart.com : OUAI Fine Hair Shampoo Refill - Thickening Shampoo for Thin Hair (32 oz) | Volumizing & Strengthening with Biotin, Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free : Beauty & Personal Care

Review: Worth the cost - Best shampoo I’ve ever tried for thinning hair. It thickens without coarsening. Smells nice too. A plus, you don’t need to use very much, which helps justify the cost. I purchased after reading the recommendation in the New York Times. As usual, they were correct.
Review: Great product and packaging - I love these bags for our dispensers it's so much easier to refill and I'm getting more product out. I also really like the product. I can tell my hair feels and looks healthier and fuller after using this product. My husband even loves to use it on his hair. Luckily we have the same hair type.

## Features

- Turn The Volume All The OUAI Up: Is volume just a button on your phone? This thickening shampoo delivers major bounce and lasting volume with a gentle clean that doesn't strip. So you can finally be fine with being fine.
- Stronger Strands, Less Breakage: Biotin reduces breakage, hydrolyzed keratin smooths and adds shine, and chia seed oil thickens and volumizes without weighing hair down. Apply to roots and work through to ends.
- A Clean Formula You Can Feel Good About: Free of sulfates, parabens, phthalates, and gluten. Safe for color-treated, keratin-treated, and chemically-processed hair. No harsh trade-offs for fine hair.
- Pair It For Best Results: Follow with OUAI Fine Conditioner to lock in volume without weight. Layer in OUAI Thickening Spray for extra lift. The full routine will have you feeling fine.
- OUAI Hair, Body & Fragrance: This thickening, volumizing shampoo is made to transport you wherever you go, with a Mercer Street scent featuring notes of Italian lemon, iris, and white musk.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084C4FLG1 |
| Active Ingredients | Biotin, Chia Seed Oil, Hydrolyzed Keratin |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #1,397 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #37 in Hair Shampoo |
| Brand | OUAI |
| Brand Name | OUAI |
| Customer Reviews | 4.8 out of 5 stars 476 Reviews |
| Hair Type | Fine |
| Item Dimensions | 6.63 x 3 x 9.88 inches |
| Item Form | Liquid |
| Item Weight | 2.1 pounds |
| Liquid Volume | 946 ml |
| Manufacturer | OUAI |
| Manufacturer Part Number | FG-0130-C-00 |
| Material Type Free | Gluten Free, Paraben Free, Phthalate Free, SLS Free, Sodium Laureth Sulfate Free |
| Model Number | 2342988 |
| Number of Items | 1 |
| Other Special Features of the Product | Volumizing |
| Package Size Name | Refill |
| Product Benefits | Volumizing |
| Recommended Uses For Product | Softening |
| Scent | Mercer Street |
| Scent Name | Mercer Street |
| Suitable Hair Color | All Hair Colors |
| UPC | 815402021306 |
| Unit Count | 32 Fluid Ounces |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** OUAI
- **Hair Type:** Fine
- **Item Form:** Liquid
- **Scent:** Mercer Street

## Images

![Fine Hair Shampoo Refill - Thickening Shampoo for Thin Hair (32 oz) | Volumizing & Strengthening with Biotin, Keratin & Chia Seed Oil for Women & Men - Lightweight, Color-Safe, Sulfate Free - Image 1](https://m.media-amazon.com/images/I/51LDgPnh4QL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the cost
*by C***H on July 8, 2026*

Best shampoo I’ve ever tried for thinning hair. It thickens without coarsening. Smells nice too. A plus, you don’t need to use very much, which helps justify the cost. I purchased after reading the recommendation in the New York Times. As usual, they were correct.

### ⭐⭐⭐⭐⭐ Great product and packaging
*by E***N on December 12, 2025*

I love these bags for our dispensers it's so much easier to refill and I'm getting more product out. I also really like the product. I can tell my hair feels and looks healthier and fuller after using this product. My husband even loves to use it on his hair. Luckily we have the same hair type.

### ⭐⭐⭐⭐⭐ Skip the Conditioner, Buy the Shampoo!
*by K***O on June 26, 2026*

One of the best shampoos for anyone who lives with hard water. Honestly, I don’t think it’s worth repeating the OUAI conditioner, but the shampoo is a must! My hair is fine-to-medium. I wash my hair every day, but this shampoo doesn’t strip away all the natural oils, leaving it moisturized even without conditioner. Don’t forget to use a detox shampoo because silicone builds up on your hair. Otherwise, my hair would end up in a weighed-down 'A-shape'.

## Frequently Bought Together

- OUAI Fine Shampoo Refill - Volumizing Shampoo with Strengthening Keratin, Biotin & Chia Seed Oil for Fine Hair - Delivers Weightless Body - Paraben, Phthalate & Sulfate Free Hair Care (32 Fl Oz)
- OUAI Fine Hair Conditioner Refill - Volumizing Conditioner Made with Keratin, Biotin and Chia Seed Oil - Adds Softness, Bounce and Volume - Free from Parabens, Sulfates, and Phthalates (32 Oz)
- OUAI Detox Shampoo Refill - Clarifying Shampoo for Build Up, Dirt, Oil, Product and Hard Water - Apple Cider Vinegar & Keratin for Clean, Refreshed Hair - Sulfate-Free Hair Care (32 oz)

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**Shop now:** [https://www.desertcart.hr/products/184499277-fine-hair-shampoo-refill-thickening-shampoo-for-thin-hair-32](https://www.desertcart.hr/products/184499277-fine-hair-shampoo-refill-thickening-shampoo-for-thin-hair-32)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-17*