"Embarrassed by Unwanted Attention, Would Never Have Bought Them"... Sneakers Face Class Action Lawsuit in U.S.

Class Action Filed Against Sports Brand On Running in the U.S.
Complaints Over Rubber Friction Noise... Brand Claims "Not a Defect"

Swiss sports brand On Running has become embroiled in a class action lawsuit in the United States over sneaker noise.

On October 18 (local time), CBS News, BBC, and other outlets reported that a class action lawsuit was filed against On Running in the U.S. District Court in Oregon on October 9. The consumers who filed the lawsuit claimed, "Every time we walk in these sneakers, they make loud noises, causing us embarrassment and discomfort," adding, "Had we known about this, we would never have made the purchase."

The products in question are sneakers featuring On Running’s core technology, CloudTec. CloudTec is designed with hexagonal and oval air pockets in the sole to enhance shock absorption and comfort.

However, consumers complained that friction between the rubber and the air pockets produces squeaking or creaking noises. Some reported feeling embarrassed when walking in quiet places such as offices or hospitals, as the noise drew unwanted attention.

On Running Sneakers. On Running Official Website

The lawsuit covers a total of 11 products, including the Cloud 5, Cloud 6, Cloudmonster, and Cloudrunner. These are premium sports shoes, priced between $140 and $180 (approximately 200,000 to 250,000 KRW).

The plaintiffs argue that On Running was aware of the noise issue but failed to improve the technology, claiming this amounts to "deceptive marketing" and "fraudulent business practices." They are demanding refunds, compensation for damages, and have requested a jury trial.

On the other hand, On Running maintains that the noise is not a product defect but rather results from normal wear or external factors. The company explained on its website that "temporary sounds may occur due to moisture, friction, or differences in insole pressure," and stated, "We do not consider this a design flaw." Although some customers requested refunds, On Running reportedly refused, saying the issue is not covered under warranty.

Experts point to air and moisture inside the sole as the main causes of sneaker noise. U.S. sports equipment company Brooks Sports advised, "Removing the insole and letting the shoe dry after use can help reduce noise." In fact, some consumers have shared their own solutions online, such as applying coconut oil to the sole’s holes or frequently drying the insoles.

On Running was founded in 2010 by triathlete Olivier Bernhard, with its headquarters in Zurich, Switzerland. The brand is now sold in over 80 countries worldwide. With its distinctive cushioning structure and stylish design, On Running has rapidly grown in popularity among running enthusiasts and fashion-conscious consumers, and is now considered a challenger to the dominance of Nike and Adidas.