OUAI Fine-to-Medium Hair Treatment Mask — Lightweight Deep-Conditioning, Hydrating & Frizz-Fighting (8 oz)

OUAI Fine to Medium Hair Treatment Mask is a lightweight deep-conditioning mask formulated with shea butter, hydrolyzed keratin, and panthenol to hydrate, smooth, and strengthen fine-to-medium hair without weighing it down.

This luxe treatment mask targets dryness, frizz, and fragile strands with a formula designed for fine-to-medium textures. It blends nourishing emollients and protein derivatives to restore manageability and shine while remaining light enough to keep volume and movement. Free of parabens, phthalates, SLS and SLES, and cruelty-free, the mask fits seamlessly into color-safe and everyday routines.

How does this mask restore moisture without flattening fine hair?

The formula uses lightweight emollients and shea butter in calibrated amounts so moisture is delivered without excess residue. Hydrolyzed keratin and panthenol penetrate and condition strands, improving elasticity while preserving body and lift at the roots.

• Lightweight shea butter for hydration without greasiness
• Hydrolyzed keratin to reinforce weakened cuticles
• Panthenol (pro-vitamin B5) for smoothness and shine
• Rinseable texture that maintains natural movement

When should I use the OUAI treatment mask in my routine?

Use it as a weekly deep treatment or as-needed for visible dryness or damage. After shampooing, apply from mid-lengths to ends, leave on for the recommended time, then rinse; it works well paired with OUAI shampoos and leave-ins for best results.

• Apply on towel-dried hair after shampooing
• Comb through to ensure even coverage
• Leave 5–10 minutes for a quick boost, or longer for deeper repair
• Rinse with cool water to help seal cuticles and add shine

Will this help reduce frizz and strengthen damaged strands?

The mask smooths the hair surface and reinforces fiber integrity, which helps reduce frizz and improve resistance to breakage. Ingredients like hydrolyzed keratin rebuild protein structure while panthenol aids in smoothing and moisture retention.

• Smoothing action reduces frizz-prone texture
• Protein support for weakened or chemically treated hair
• Improves manageability for easier styling
• Non-heavy finish keeps hair touchable and soft

Is it safe for color-treated or chemically processed hair?

This mask is formulated without harsh sulfates and common irritants, making it safe for most color-treated and chemically processed hair types. Its nourishing yet lightweight composition helps maintain color vibrancy and manageability when used as part of a gentle care routine.

• Free from parabens, phthalates, SLS, and SLES
• Color-friendly ingredients to preserve dye longevity
• Suitable for relaxed, highlighted, or balayage-treated hair
• Supports regular maintenance without flattening color-treated locks

Who is this for: The OUAI Fine to Medium Hair Treatment Mask is ideal for people with fine, thin, or medium-density hair seeking hydration and repair without losing volume. It's a good pick for anyone with heat or color damage who wants a non-greasy conditioning treatment that smooths, strengthens, and leaves hair soft, manageable, and shiny.

Ingredients

Aqua (Water, Eau), Cetearyl Alcohol, Behentrimonium Chloride (Anti-Static Agent / Agent Antistatique), Cetyl Alcohol, Stearamido-Propyl Dimethylamine, Cetyl Esters, Hydrogenated Ethylhexyl Olivate, Amodimethicone, Isododecane, Jojoba Esters, Glycerin, Butyrospermum Parkii (Shea) Butter, Panthenol, Oryza Sativa (Rice) Bran Oil, Cocos Nucifera (Coconut) Water, Phyllostachys Bambusoides Juice, Tamarindus Indica Seed Gum, Laureth-9, Daucus Carota Sativa (Carrot) Root Extract, Hydrolyzed Hibiscus Esculentus Extract, Jasminum Officinale (Jasmine) Flower Extract, Nasturtium Officinale Extract, Helianthus Annuus (Sunflower) Seed Oil, Zingiber Officinale (Ginger) Root Extract, Amaranthus Caudatus Seed Extract, Moringa Oleifera Seed Extract, Hydrolyzed Linseed Extract, Pisum Sativum (Pea) Extract, Cynara Scolymus (Artichoke) Leaf Extract, Arginine, Alanine, Glycine, Histidine, Isoleucine, Phenylalanine, Serine, Valine, Proline, Threonine, Aspartic Acid, Laurdimoni-Um Hydroxypropyl Hydrolyzed Keratin, Hydrolyzed Rice Protein, Hydrolyzed Corn Protein, Hydrolyzed Yeast Protein, Ethylhexylglycerin, Propanediol, Pentylene Glycol, Parfum (Fragrance), Cetrimonium Chloride (Antistatic Agent/Agent Antistatique), Trideceth-12, C11-15 Pareth-7, Polysilicone-15, Hydrolyzed Vegetable Protein Pg-Propyl Silanetriol, Cystine Bis-Pg-Propyl Silanetriol, Sodium Pca, Pca, Diisostearyl Malate, Polysorbate 60, Hydrogenated Olive Oil Unsaponifiables, Leuconostoc/Radish Root Ferment Filtrate, Sodium Lactate, Guar Hydroxypropyltrimonium Chloride, Hydroxyethylcellulose, Bht, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Disodium Edta, Disodium Phosphate, Sodium Phosphate, Isopropyl Alcohol, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Sodium Benzoate, Gluconolactone, Calcium Gluconate, Potassium Sorbate, Trideceth-3, Trideceth-15, Acetic Acid, Citric Acid, Phenoxyethanol, Caprylyl Glycol, Chlorphenesin, Benzoic Acid, Sorbic Acid, Benzyl Alcohol, Citronellol, Linalool