Boston’s New Balance just dragged French retail giant Decathlon into federal court over a logo that is supposed to be a “K” and somehow ends up looking exactly like an “N.”
On September 15, 2026, New Balance Athletics Inc. filed suit in the U.S. District Court for the District of Massachusetts (No. 1:26-cv-14235) against Decathlon America LLC and a related unit. The target is the mark slapped on Kiprun performance running shoes. Decathlon insists the design is a stylized K. New Balance says the mirror-image version that appears on the shoes and in marketing is “unmistakably an N.”
The complaint does not mince words. New Balance has used its N marks on footwear since the 1970s. It has spent hundreds of millions promoting them and sold hundreds of millions of pairs worldwide. The letter is one of the company’s most valuable assets. When Decathlon started shipping Kiprun models into the U.S. market earlier this year, social-media users immediately spotted the resemblance. Posts called out the similarity to New Balance’s SC Elite and asked why no cease-and-desist had landed yet.
New Balance says it did land the notice. Starting in January 2026 the company and its lawyers repeatedly told Decathlon to stop. Decathlon refused, sticking to the “it’s a K” line even while using the flipped version in isolation. The two companies already had a commercial relationship—Decathlon affiliates distribute New Balance products in various markets—so the refusal landed with extra weight.
The lawsuit seeks an injunction, a full recall of the accused shoes, destruction of remaining inventory and advertising materials, an accounting of profits, and damages to be decided by a jury. New Balance also alleges willful infringement and dilution under federal and state law, plus false designation of origin and common-law claims. A key plank is post-sale confusion: runners and spectators who later see the shoes on the road or in race photos may assume they are New Balance.
This is not New Balance’s first fight over the letter. It previously settled U.S. cases with Michael Kors and Nautica over N-adjacent designs and won a $1.5 million judgment in China against local shoemakers in 2017. The pattern is consistent: the company treats visual cousins of its N as direct threats to the goodwill it has built for half a century.
For Decathlon the exposure is concrete. Inventory already in U.S. channels, marketing materials, and future releases all sit under the cloud of a potential injunction and recall order. Rebranding a house-brand performance line is expensive. Destroying stock is worse. The longer the lookalike stays on shelves, the higher the eventual bill.
The Cheap Moment Is Before the Lookalike Hardens
Trademark offices rarely block confusing marks on their own. Relative grounds—the clash with an earlier right—are the owner’s problem. Opposition windows are short, typically thirty to ninety days after publication. Once a mark registers and products hit the market, the fight moves to federal court, discovery, and injunction practice. That is where costs explode.
Failure to watch for lookalikes is how rights weaken. Dilution creeps in. Customers mix up the sources. Expansion plans hit unexpected blocks. Due-diligence reviews later surface a mess that could have been cleaned up early. Exact copies are rare. The real damage comes from one-letter shifts, phonetic twins, mascot cousins, and packaging or logos that feel familiar at a glance—the very pattern on display in the Kiprun design.
Watching the register is cheaper than a roadside rebrand. The work of watching a mark exists for cases like this; what happens if you wait is written in the complaint that just landed in Massachusetts.
The N was already New Balance’s problem long before the mirror-image K showed up on a Kiprun shoe. The only cheap moment is before the lookalike hardens.