OUAI Hydrating Shampoo Refill for Medium Hair — 32 oz, Frizz-Reducing & Color-Safe

OUAI Medium Hair Shampoo Refill (32 oz) is a hydrating, frizz-reducing shampoo concentrate designed for medium-density hair that gently cleanses while restoring shine and manageability.

This 32-ounce refill bottle delivers OUAI's Medium formula in a lower-waste format, formulated to suit hair that's neither fine nor coarse. The blend balances cleansing and moisture: babassu and coconut oils hydrate and seal, kumquat brings shine, and keratin helps smooth and detangle. It's free from sulfates, parabens, and phthalates and is safe for color- and chemically-treated hair.

How will this refill fit into my shower routine?

Use the refill to top up your existing OUAI shampoo bottle or add directly to a dispensing container. Lather at the roots and glide the formula through to the ends to remove buildup while delivering hydration and frizz control. Rinse thoroughly and follow with OUAI Medium Conditioner for best results.

• Refill reduces single-use plastic by extending your original OUAI bottle.
• Apply to wet hair, massage into scalp, then distribute to ends.
• Pair with OUAI conditioner and hair oil to lock in moisture and shine.

What benefits will my medium-density hair notice?

The shampoo targets the balance between cleansing and nourishment—removing excess oil and residue while replenishing moisture to prevent frizz. Over time, strands look smoother and feel stronger thanks to keratin and natural oils. It’s formulated to maintain color and chemical treatments without harsh sulfates.

• Hydrates without weighing hair down.
• Reduces breakage and seals split ends with coconut oil.
• Improves shine and manageability via kumquat extract and keratin.

Is this formula safe for treated or textured hair?

Yes—the formula is crafted to be gentle on color-, keratin-, and chemically-treated hair while still working for straight, wavy, curly, and coily textures. It’s free of sulfates, parabens, and phthalates and is cruelty- and gluten-free, so it fits many modern care routines. Always follow with conditioner for textured hair to maintain hydration.

• Safe for color-treated and keratin-treated hair.
• Suitable for all textures: straight to coily.
• Cruelty-free and free of common harsh additives.

How does the scent and sensory experience measure up?

OUAI Medium Shampoo Refill carries the brand’s Mercer Street fragrance—a bright blend centered on Italian lemon, jasmine, and white musk—which leaves hair lightly perfumed without overwhelming. The texture lathers easily and rinses clean, leaving strands feeling soft rather than stripped. The refill format preserves the scent consistency of the original bottle.

• Mercer Street fragrance: citrus top notes with floral and musk base.
• Rich lather that rinses clean for fresh-feeling hair.
• Refill keeps the same sensory profile as OUAI’s standard bottle.

Who is this for: The OUAI Medium Hair Shampoo Refill 32 oz is aimed at people with medium-density hair who want a hydrating, frizz-controlling cleanser that’s safe for color and chemical treatments. It suits anyone seeking to reduce plastic waste while maintaining a salon-quality routine—especially those who follow with OUAI Medium Conditioner and finishing products for maximum smoothness and shine.

Ingredients

Aqua (Water, Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Cocamide Mipa, Glycol Distearate, Parfum (Fragrance), Amodimethicone, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Glycerin, Citrus Japonica Fruit Extract, Panthenol, Hydrolyzed Keratin, Polyquaternium-7, Orbignya Oleifera Seed Oil, Cocos Nucifera (Coconut) Oil, Peg-150 Distearate, Sodium Lauroyl Glycinate, Cetrimonium Chloride (Anti-Static Agent/Agent Antistatique), C11-15 Pareth-7, Laureth-9, Trideceth-12, Cocoglucosides Hydroxypropyltrimonium Chloride, Acrylates Copolymer, Tocopherol, Peg-200 Hydrogenated Glyceryl Palmate, Peg-7 Glyceryl Cocoate, Disodium Edta, Citric Acid, Sodium Chloride, Sodium Hydroxide,, Tetrasodium Edta, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate, Benzyl Alcohol, Benzyl Salicylate, Limonene, Hexyl Cinnamal, Ci 15985 (Yellow 6)