The Kudos diapers lawsuit was a proposed class action filed in April 2024 accusing Kudos Innovations of falsely marketing its Ultimate Diaper as safe and plant-based while independent testing allegedly found PFAS, or “forever chemicals,” in the product. The plaintiffs voluntarily dismissed the case less than three months later, on June 26, 2024, and no court ever ruled on whether the claims had merit.1Truth in Advertising (TINA.org). Ultimate Diaper Class Action
What the Lawsuit Alleged
Plaintiffs Kimmy Deng and Ekaterina Kim filed Deng et al. v. Kudos Innovations, Inc. on April 2, 2024 in the U.S. District Court for the District of Massachusetts, Case No. 1:24-cv-10845, before Judge Nathaniel M. Gorton.2CourtListener. Deng v. Kudos Innovations, Inc.
The complaint focused on how Kudos marketed its Ultimate Diaper. According to the plaintiffs, Kudos advertised the product as “the safest diaper for baby’s sensitive skin” and as made of “plant-based materials,” while independent testing had found per- and polyfluoroalkyl substances (PFAS) in the diapers. The lawsuit argued that these safety and materials claims were misleading given the alleged contamination.1Truth in Advertising (TINA.org). Ultimate Diaper Class Action
PFAS are called “forever chemicals” because they break down very slowly and can accumulate in the human body over time. In diapers, the concern is prolonged skin contact with a baby’s sensitive skin. No federal law currently requires manufacturers to warn consumers about PFAS in consumer products.
The Testing Behind the Case
The testing that appears to have prompted the suit came from Mamavation, a consumer health website, working with Environmental Health News and Gentle Nursery. Their study tested multiple diaper brands for indicators of PFAS and flagged Kudos as one showing signs of the chemicals.3Mamavation. Disposable and Cloth Diapers Tested for Indications of PFAS Forever Chemicals
Kudos has pointed to its OEKO-TEX Standard 100 Class 1 certification, obtained in February 2022, under which every component of the diaper was tested and verified to be free from over 100 harmful chemicals.4Kudos. Kudos Is Now OEKO-TEX Standard 100 Certified Mamavation contended that the OEKO-TEX methodology relies on Extractable Organic Fluorine analysis, which they said cannot detect certain PFAS polymers like PTFE. So the underlying dispute is not only about what the tests found but about which testing method is adequate in the first place.3Mamavation. Disposable and Cloth Diapers Tested for Indications of PFAS Forever Chemicals
How the Case Ended
The case never got near trial. After filing, the only meaningful docket activity involved out-of-state attorney appearances and two agreed extensions of Kudos’ response deadline. Kudos never formally answered the complaint, and no amended complaint was filed.5PACER Monitor. Deng et al v. Kudos Innovations, Inc.
On June 26, 2024, the plaintiffs filed a notice of voluntary dismissal. The case was terminated two days later. The dismissal came with an important split:
- Deng and Kim’s individual claims were dismissed with prejudice, meaning those two plaintiffs cannot refile them.
- The class claims were dismissed without prejudice, leaving room for other consumers to bring a new or amended complaint later.
1Truth in Advertising (TINA.org). Ultimate Diaper Class Action2CourtListener. Deng v. Kudos Innovations, Inc.
No public explanation was given for the dismissal. Voluntary dismissals at this stage can happen for many reasons: the plaintiffs may have anticipated a standing problem, a confidential settlement may have been reached, or counsel may have decided the claims were not viable as framed.
A comparable case supports the standing theory. In Saedi v. Coterie Baby Inc., another 2024 diaper PFAS class action, a federal judge in New York dismissed the case in October 2024 after finding the plaintiff could not show that the specific diapers she purchased actually contained PFAS.6Bloomberg Law. Eco-Friendly Diaper Company Hit With PFAS False Ad Class Action7Alston & Bird. Diaper Manufacturer Wins Dismissal of PFAS-Related Suit
What This Means for Parents Buying Kudos
Because the case was voluntarily dismissed before Kudos filed any answer, no court has found that Kudos’ diapers do or do not contain PFAS, and no court has ruled on whether the marketing was misleading. The allegations remain allegations. Kudos’ OEKO-TEX Standard 100 Class 1 certification remains in place, and the Mamavation testing methodology dispute was never resolved by a judge.
There is also no settlement fund and no claim form tied to this case. If you were hoping to file for compensation as a Kudos customer, there is nothing to file for. Because the class claims were dismissed without prejudice, a new lawsuit on similar facts remains legally possible, but as of the case’s termination on June 28, 2024, no such refiled action against Kudos has been reported in the record reviewed here.
If PFAS exposure through diapers is a concern for you, the practical takeaway from the Kudos and Coterie cases is the same: independent lab testing and third-party certifications can point in different directions, and “plant-based” or “safest” marketing language is not, by itself, a guarantee of PFAS-free composition. Reading a brand’s certification details, and what those certifications actually test for, tells you more than the front of the package.