OUAI Thick Hair Shampoo Refill 32 oz – Hydrating Shea Butter + Keratin for Full, Frizzy Hair

OUAI Thick Hair Shampoo is a deeply hydrating, sulfate-free cleanser formulated to soften, detangle, and strengthen full, frizzy, or textured hair.

This 32 oz refill delivers concentrated moisture and slip with a gourmand Mercer Street scent, combining shea butter, marshmallow root, avocado oil, and keratin to nourish strands while removing buildup. Designed for straight, wavy, curly and coily hair, the formula focuses on reducing breakage and smoothing frizz without sulfates, parabens or phthalates, making it safe for color- and chemically-treated hair.

How does this shampoo add moisture without weighing hair down?

OUAI Thick Hair Shampoo balances rich emollients and lightweight botanicals to provide hydration and slip without leaving residue. Shea butter and avocado oil deliver lasting softness while marshmallow root improves detangling so you use less force when combing wet hair.

• Shea butter: deeply hydrates and helps seal moisture.
• Avocado oil: strengthens and conditions split ends.
• Marshmallow root: boosts slip for easier detangling.
• Sulfate-free base: cleans without stripping natural oils.

Will this help reduce frizz and improve manageability?

The formula contains keratin and smoothing agents that smooth the hair surface to reflect more light and reduce flyaways. Regular use helps hair feel more coherent and easier to style, especially when paired with the matching OUAI Thick Conditioner and Hair Oil.

• Keratin: smooths cuticle and enhances shine.
• Combination routine: works best with OUAI Thick Conditioner.
• Color-safe: maintains manageability on color-treated hair.

Is this shampoo suitable for chemically processed or color-treated hair?

Yes — the clean, gentle formulation is free from sulfates, parabens and phthalates, and is safe for color-treated, keratin-treated and other chemically processed hair. The refill format also reduces packaging waste for frequent washers.

• Free of harsh sulfates: protects color and treatments.
• Cruelty-free and gluten-free: aligns with conscious routines.
• Refill 32 oz: cost-effective for long-term use.

How should I use it in my weekly routine?

Apply a quarter-size amount to wet roots, lather gently, and work the formula down to ends to lift dirt and product buildup while depositing moisturizers. Follow with OUAI Thick Conditioner to lock in hydration and finish with OUAI Hair Oil for extra smoothing and shine.

• Use on wet hair: concentrate at roots and then through lengths.
• Pair with Thick Conditioner post-wash for best results.
• Add Hair Oil to ends for added protection and gloss.

Who is this for: OUAI Thick Hair Shampoo is ideal for people with naturally thick, frizzy, or textured hair who want a moisturizing, detangling cleanser that supports stronger strands and smoother styling. It’s also a good pick for anyone with color-treated or chemically processed hair seeking sulfate-free care and a refill option for frequent use.

Ingredients

Aqua (Water, Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Cocamide Mipa, Glycol Distearate, Parfum (Fragrance), Cetrimonium Chloride (Anti-Static Agent/Agent Antistatique), Panthenol, Hydrolyzed Keratin, Avena Sativa (Oat) Peptide, Butyrospermum Parkii (Shea) Butter, Althaea Officinalis Root Extract, Persea Gratissima (Avocado) Oil, Glycerin, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Peg-150 Distearate, Sodium Lauroyl Glycinate, Amodimethicone, C11-15 Pareth-7, Laureth-9, Trideceth-12, Polyquaternium-7, Cocoglucosides Hydroxypropyltrimonium Chloride, Acrylates Copolymer, Sodium Chloride, Sodium Hydroxide, Tetrasodium Edta, Disodium Edta, Citric Acid, Peg-200 Hydrogenated Glyceryl Palmate, Peg-7 Glyceryl Cocoate, 1,2-Hexanediol, Caprylyl Glycol, Benzoic Acid, Potassium Sorbate, Phenoxyethanol, Sodium Benzoate, Benzyl Alcohol, Benzyl Salicylate, Limonene, Hexyl Cinnamal, Ci 14700 (Red 4), Ci 15985 (Yellow 6)