MONDAY HAIRCARE Volume Shampoo for Thin, Fine & Flat Hair — 798 mL Bottle, Hydrolyzed Collagen & Macadamia Oil

MONDAY Haircare VOLUME Shampoo is a sulfate- and paraben-free formula with hydrolyzed collagen and macadamia oil designed to add body and shine to thin, fine, and flat hair.

This award-winning shampoo blends hydrolyzed collagen to plump strands and macadamia oil to smooth and add reflective shine, while remaining pH-balanced, dermatologically tested, and cruelty-free. The 798 mL recyclable bottle makes it a practical choice for daily use or for households that want more shampoo per purchase. Ideal for anyone seeking lightweight lift without heavy silicones or harsh sulfates, the formula focuses on fuller-looking hair and healthier-feeling texture.

How does this shampoo boost volume without weighing hair down?

The hydrolyzed collagen in the formula penetrates and coats the hair shaft to temporarily increase strand diameter and give a fuller appearance. Lightweight macadamia oil delivers moisture and gloss without leaving a heavy residue, so roots stay buoyant and lengths remain touchable.

• Hydrolyzed collagen helps thicken individual strands for visible body.
• Macadamia oil smooths cuticles for improved shine without greasiness.
• Sulfate-free cleansing keeps hair from being stripped and flattened.

Is this safe for sensitive scalps and color-treated hair?

The shampoo is pH-balanced and dermatologically tested to minimize irritation risk and is formulated without parabens and sulfates—ingredients that can strip dye or irritate sensitive scalps. Always patch-test a new product and consult your colorist if you have recent chemical treatments.

• pH-balanced to help maintain scalp and color stability.
• Dermatologically tested for reduced irritation potential.
• Free of parabens and sulfates that can dull color or dry hair.

What kind of results can I expect and how soon?

Many users notice improved manageability and a perception of thicker hair after a few washes, with cumulative fullness and shine as collagen and emollients rebuild texture over time. Results vary depending on hair condition and routine.

• Noticeable lift at the roots after regular use across several shampoos.
• Smoother, shinier lengths due to macadamia oil enrichment.
• Best combined with complementary MONDAY styling products for longer-lasting volume.

How should I use it to maximize volume?

Apply to wet hair, massage gently at the roots to activate the collagen blend, and rinse thoroughly. For added fullness, follow with a lightweight conditioner focused on lengths—not roots—and style with a root-lifting product or blow-dry for extra lift.

• Use a quarter-size amount for shorter hair; more for longer lengths.
• Concentrate lather at the scalp, rinse well to avoid buildup.
• Pair with a weightless conditioner and volumizing styling aids.

Who is this for: MONDAY Haircare VOLUME Shampoo is aimed at people with thin, fine, or flat hair who want visible body and improved shine without heavy ingredients. It's suitable for daily use, those avoiding parabens and sulfates, cruelty-free shoppers, and anyone seeking a larger-format, recyclable-bottle shampoo that performs in both salon and home routines.

Ingredients

Aqua (Water), Cocamidopropyl Betaine, Disodium Laureth Sulfosuccinate, Sodium C14-16 Olefin Sulfonate, Sodium Chloride, Glycerin, Hydrolyzed Collagen, Macadamia Integrifolia Seed Oil, Sodium Methyl Cocoyl Taurate, Cocamide MIPA, Polyquaternium-10, PEG-120 Methyl Glucose Dioleate, Salicylic Acid, Citric Acid, Polyquaternium-7, Phenoxyethanol, Sodium Benzoate, Parfum (Fragrance), Menthol, Hexyl Cinnamal, Linalool.