Athletic shoe company On is facing a lawsuit from customers who claim that its popular sneakers make a "noisy and embarrassing squeak".
The "CloudTec" sneakers typically cost around $200 (£150) and have holes in the sole designed to make users feel like they are "running on clouds". Instead, the lawsuit says, they cause issues in daily life - especially for nurses who wear them all day.
"No reasonable consumer would purchase Defendant's shoes - or pay as much for them as they did - knowing each step creates an audible and noticeable squeak," the customers allege.
The company, which did not immediately respond to a BBC enquiry, has declined to comment on the allegations.
The customers say that multiple On sneaker styles are unwearable without "significant DIY modifications". They accused the company of "deceptive marketing".
