Monday Haircare products are underfilled, class action lawsuit alleges

Monday shampoo class action overview:

• Who: Plaintiff Silvia Garcia filed a class action lawsuit against Zuru LLC, doing business as Monday Haircare.
• Why: Garcia alleges Monday Haircare products are sold in deceptive, oversized packaging.
• Where: The Monday shampoo class action lawsuit was filed in California federal court.

A new class action lawsuit claims Monday Haircare sells products in oversized bottles that mislead consumers by making the product appear full when it is not.

Plaintiff Silvia Garcia filed the class action lawsuit on July 25 in California federal court, alleging violations of state consumer laws.

Garcia says she purchased Monday Moisture + Hyaluronic Acid Shampoo from a Target store in May 2025 and was disappointed to find that the container had a significant amount of empty space. She alleges that she would not have purchased the product or paid a premium price for it had she known about the underfilling.

The class action lawsuit claims Monday’s “slack-fill scam” extends to its 12-fluid-ounce Monday Moisture + Hyaluronic Acid Shampoo product sold in opaque containers.

Monday manufactures and sells a popular line of haircare products.

Monday Haircare class action: Consumers misled by oversized and opaque packaging

The Monday class action lawsuit claims that the brand’s opaque containers prevent consumers from accurately assessing the amount of product they are purchasing.

The plaintiff argues that even if consumers check the net weight of the product before buying, they would not expect the actual amount of shampoo to be significantly less than the size of the container suggests.

The class action lawsuit alleges that Monday’s packaging practices harm consumers and give the company an unfair advantage over competitors who accurately label their products. The plaintiff says several California courts have found similar slack-fill claims to be meritorious and suitable for class action treatment.

Garcia seeks to represent all consumers who purchased Monday Haircare’s underfilled products in the past four years.

She is suing for violations of California’s Unfair Competition Law, False Advertising Law, and Consumers’ Legal Remedies Act, and seeks certification of the class action, damages, restitution, disgorgement and an injunction barring the company from selling underfilled products in the future.

In other lawsuits concerning hair and beauty products, Farouk Systems is accused of falsely advertising its CHI and BioSilk haircare products as made in the United States and containing natural ingredients.

What do you think of the allegations made in this Monday Haircare class action? Let us know in the comments.

The plaintiff is represented by Scott J. Ferrell and Victoria C. Knowles of Pacific Trial Attorneys APC.

The Monday Haircare class action lawsuit is Garcia v. Zuru LLC, Case No. 5:25-cv-01908, in the U.S. District Court for the Central District of California.

Read About More Class Action Lawsuits & Class Action Settlements:

• Jeep recalls over 91K SUVs due to software issue causing power loss
• Judge tells Burger King it must face class action allegations of illegal web tracking
• Google class action trial ends with $425M verdict for cellphone users over app data tracking
• 1.1 million Farmers Insurance customers hit by data breach linked to Salesforce hack