OUAI Thick Hair Shampoo 32 oz Refill — Hydrating Shea Butter & Keratin for Fuller, Frizz‑Free Hair

OUAI Thick Hair Shampoo is a deeply hydrating, sulfate-free shampoo formulated with shea butter, marshmallow root, avocado oil and keratin to cleanse, detangle and reduce frizz for fuller-looking hair.

This 32 oz refill bottle delivers OUAI's Thick Hair formula in a larger size for regular use: it cleanses without stripping, adds moisture, softens tangles and helps smooth strands to improve manageability. The formula is free of sulfates, parabens and phthalates, and it’s safe for color- and chemically treated hair. Scented with OUAI’s Mercer Street fragrance—Italian lemon, jasmine and white musk—this shampoo works best when paired with the Thick Conditioner and Hair Oil in the routine.

How does this shampoo hydrate coarse or frizzy hair?

The shampoo combines emollient shea butter with marshmallow root to provide immediate slip for detangling and sustained moisture to reduce dryness-driven frizz. Avocado oil and keratin deliver strengthening and smoothing benefits so hair feels softer and looks shinier after rinsing.

• Shea butter seals in hydration and helps prevent moisture loss.
• Marshmallow root creates slip for easier comb-through and less breakage.
• Avocado oil targets split ends and supports strand resilience.
• Keratin smooths cuticle texture to reduce frizz and boost shine.

Will this formula work with color-treated or chemically processed hair?

Yes — the shampoo is formulated without harsh sulfates and is gentle enough for color-, keratin- and chemically treated hair. It cleanses effectively while prioritizing hydration and strengthening ingredients to help preserve treated hair integrity.

• Sulfate-, paraben- and phthalate-free to limit color fading and dryness.
• Cleanses without stripping natural oils important for treated hair.
• Hydrating actives help reduce breakage common after chemical services.
• Suitable as part of a post-treatment maintenance routine.

How should I use OUAI Thick Hair Shampoo for best results?

Apply to wet hair, lather at the roots and gently work the formula through to the ends to detangle and lift buildup. Follow with OUAI Thick Conditioner to lock in moisture, and add OUAI Hair Oil on damp hair for additional smoothness and shine.

• Use a quarter-size to palm-size amount depending on hair length and thickness.
• Focus shampoo on the scalp and roots, then comb through to ends.
• Rinse thoroughly and follow with the matching conditioner.
• Use regularly or as needed; refill size suits frequent wash schedules.

What sensory experience does this shampoo offer?

The Mercer Street fragrance blends bright Italian lemon top notes with jasmine and a warm white musk base for a modern, clean scent that lingers after rinsing. The texture produces a creamy lather that provides instant slip for detangling and a satin finish once hair is dry.

• Creamy lather for comfortable cleansing and easy distribution.
• Pleasant citrus-floral scent with a subtle musk drydown.
• Refill format reduces packaging waste and suits high-use households.
• Lightweight finish that won’t weigh thick hair down.

Who is this for? OUAI Thick Hair Shampoo 32 oz refill is designed for people with straight, wavy, curly or coily hair that needs extra moisture, detangling and frizz control—especially those with thick, dry or chemically treated hair who wash frequently and prefer a larger, refillable size. If you want a hydrating cleansing step that pairs seamlessly with a conditioner and finishing oil to build a routine for fuller, smoother-looking strands, this product is a practical choice.

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)