Boston-based wearable fitness company WHOOP has initiated legal proceedings against Finnish competitor Polar Electro Oy, alleging that Polar’s fitness tracker design infringes upon WHOOP’s trade dress. The lawsuit, filed on October 14, 2025, in the U.S. District Court for the Eastern District of New York, contends that Polar’s Loop band closely mimics WHOOP’s distinctive design elements, including a continuous fabric band covering the sensor, metallic side accents, and a faceless front devoid of display or buttons. WHOOP asserts that these features are non-functional and serve as identifiers of its brand. ([mobihealthnews.com](https://www.mobihealthnews.com/news/whoop-sues-polar-trademark-infringement?utm_source=openai))
In response, Polar has firmly denied any allegations of intellectual property infringement, emphasizing that its products result from decades of innovation and rigorous design processes. ([tech.yahoo.com](https://tech.yahoo.com/wearables/articles/polar-firmly-denies-allegations-being-120501572.html?utm_source=openai))
This legal action is part of a series of recent challenges for WHOOP. In July 2025, the U.S. Food and Drug Administration (FDA) issued a warning letter to the company regarding its Blood Pressure Insights feature, stating that it qualifies as a medical device and is being marketed without proper regulatory approval. ([mobihealthnews.com](https://www.mobihealthnews.com/news/whoop-receives-warning-letter-fda-blood-pressure-insights?utm_source=openai)) WHOOP has contested this claim, arguing that the feature is a wellness tool under the 21st Century Cures Act. ([mobihealthnews.com](https://www.mobihealthnews.com/news/whoop-pushes-back-fda-over-blood-pressure-feature?utm_source=openai))
Additionally, WHOOP is facing a class-action lawsuit filed in August 2025, accusing the company of unlawfully disclosing sensitive personal data of its fitness tracker and app users to third parties without consent. ([classaction.org](https://www.classaction.org/news/whoop-facing-class-action-lawsuit-for-allegedly-sharing-users-fitness-tracker-data-without-permission?utm_source=openai))
The outcome of the lawsuit against Polar could have significant implications for design standards and intellectual property rights within the wearable technology industry. As the case progresses, it will be closely monitored by industry stakeholders and legal professionals alike.